- Where the context requires, the singular includes the plural and the plural includes the singular.
- The use of “and” in a conjunctive provision means that all elements in the provision must be complied with or must exist to make the provision applicable. Where compliance with one or more elements suffices, or where existence of one or more elements makes the provision applicable, “or” (rather than “and/or”) is used.
- “Shall” is mandatory and “may” is permissive.
(b) Part 6, shall be defined as specified in Section 100.1. Terms, phrases, words and their derivatives not found in Section 100.1 shall be defined as specified in the “Definitions” chapters of Title 24, Parts 1 through 5 of the California Code of Regulations. Where terms, phrases, words and their derivatives are not defined in any of the references above, they shall be defined as specified in Webster’s Third New International Dictionary of the English Language, Unabridged (1961 edition, through the 2002 addenda), unless the context requires otherwise.. Terms, phrases, words and their derivatives in
is the Air-Conditioning Contractors of America.
is a description of test procedures in the Reference Nonresidential Appendices that includes equipment and systems to be tested, functions to be tested, conditions under which the test shall be performed, the scope of the tests, results to be obtained and measurable criteria for acceptable performance.
ACCESSIBLE is having access thereto, but which first may require removal or opening of access panels, doors or similar obstructions.
is any change to a building that increases conditioned floor area and conditioned volume. See also, “newly conditioned space.” Addition is also any change that increases the floor area and volume of an unconditioned building of an occupancy group or type regulated by Part 6. Addition is also any change that increases the illuminated area of an outdoor lighting application regulated by Part 6.
is a structure designed and constructed to house farm implements, hay, grain, poultry, livestock or other horticultural products. It is not a structure that is a place of human habitation, a place of employment where agricultural products are processed, treated or packaged, or a place used by the public.
is a combination of interconnected materials and assemblies joined and sealed together to provide a continuous barrier to air leakage through the building envelope that separates conditioned from unconditioned space, or that separates adjoining conditioned spaces of different occupancies or uses.
is an appliance that supplies cooled and dehumidified air to a space for the purpose of cooling objects within the space.
is an air conditioner using an air-cooled condenser.
or is a blower or fan that distributes supply air to a room, space or area.
or is air-cleaning equipment used for removing particulate matter from the air.
is the part of the air filter equipment which is the actual particulate removing agent.
is a device which will reduce the heat losses or gains that occur when a building is mechanically ventilated, by transferring heat between the conditioned air being exhausted and outside air being supplied.
is an appliance that consists of one or more factory-made assemblies that includes an indoor conditioning coil, a compressor and a refrigerant-to-air heat exchanger, and that provides heating and cooling functions.
is any change to a building’s water-heating system, space-conditioning system, lighting system, electrical power distribution system, or envelope that is not an addition. Alteration is also any change that is regulated by Part 6 to an outdoor lighting system that is not an addition. Alteration is also any change that is regulated by Part 6 to signs located either indoors or outdoors. Alteration is also any change that is regulated by Part 6 to a covered process that is not an addition.
is a component that has undergone an alteration and is subject to all applicable Standards requirements.
ALTERNATIVE CALCULATION METHODS (ACM) APPROVAL MANUAL are the documents establishing the requirements for Energy Commission approval of Compliance Software used to demonstrate compliance with the Building Energy Efficiency Standards for Residential and Nonresidential Buildings currently adopted by the Energy Commission.
is a measure of the percentage of heat from the combustion of gas or oil which is transferred to the space being heated during a year, as determined using the applicable test method in the (AFUE) Appliance Efficiency Regulations or Section 110.2.
is a type of visual signaling device that indicates the on, off, or other status of a load.
is the American National Standards Institute.
is the document coauthored by the American National Standards Institute and the Illuminating Engineering Society of North America, Recommended Practice titled “Nomenclature and Definitions for Illuminating Engineering.”
is the American National Standards Institute document titled “Gas Water Heaters, Volume III, Storage Water Heaters With Input Ratings Above 75,000 Btu Per Hour,” 2011. ( ANSI Z21.10.3-2011/CSA 4.3-2011).
is the American National Standards Institute document titled “Gas-Fired Low Pressure Steam and Hot Water Boilers,” 2010. ( ANSI Z21.13-2010/CSA 4.9-2010).
is the American National Standards Institute document titled “Addenda 1 to ANSI Z21.40.4-1996/CGA 2.94-M96, Performance Testing and Rating of Gas-Fired, Air Conditioning and Heat Pump Appliances,” 1998. (ANSI Z21.40.4-1998/CGA 2.94A-M98).
is the American National Standards Institute document titled “Gas-Fired Central Furnaces,” 2006. ( ANSI Z21.47-2006/CSA 2.3-2006).
is the American National Standards Institute document titled “American National Standard/CSA Standard For Gas Unit Heaters, Gas Packaged Heaters, Gas Utility Heaters and Gas-Fired Duct Furnaces,” 2009 ( ANSI Z83.8-2009/CSA 2.6-2009).
are the regulations in Title 20, Sections 1601 et seq. of the California Code of Regulations.
(See “ alternative calculation methods.”)
is the Air-Conditioning, Heating and Refrigeration Institute.
is the Air-Conditioning, Heating and Refrigeration Institute document titled “Performance Rating of Unitary Air-Conditioning and Air- Source Heat Pump Equipment,” 2008 (ANSI/AHRI Standard 210/240-2008 with Addenda 1 and 2).
is the Air-Conditioning, Heating and Refrigeration Institute document titled “Performance Rating of Commercial and Industrial Unitary Air-Conditioning and Heat Pump Equipment,” 2007 (ANSI/AHRI Standard 340/360-2007 with Addenda 1 and 2).
is the Air-Conditioning, Heating and Refrigeration Institute document titled “Performance Rating of Water Chilling Packages Using the Vapor Compression Cycle,” 2011 ( AHRI Standard 550/590-982003(I-P)-2011).
is the Air-Conditioning, Heating and Refrigeration Institute document titled “Performance Rating of Variable Refrigerant Flow (VRF) Multi-Split Air-Conditioning and Heat Pump Equipment,” 2010 (AHRI Standard 1230-2010) with Addendum 1.
is the American Society of Heating Refrigerating and Air-Conditioning Engineers.
is the American Society of Heating, Refrigerating and Air-Conditioning Engineers document titled “ ASHRAE Climatic Data for Region X, Arizona, California, Hawaii and Nevada,” Publication SPCDX, 1982 and “Supplement,” 1994.
is the American Society of Heating, Refrigerating and Air-Conditioning Engineers document titled “ ASHRAE Handbook: Heating, Ventilating, and Air-Conditioning Applications.” (2011)
is the American Society of Heating, Refrigerating and Air-Conditioning Engineers document titled “ ASHRAE Handbook: Fundamentals.” (2009)
is the American Society of Heating, Refrigerating and Air-Conditioning Engineers document titled “Method of Testing General Ventilation Air-Cleaning Devices for Removal Efficiency by Particle Size,” 2012 (ANSI/ASHRAE Standard 52.2-2012).
is the American Society of Heating, Refrigerating and Air-Conditioning Engineers document titled “Thermal Environmental Conditions for Human Occupancy,” 2010 ( ASHRAE Standard 55-2010).
is the American Society of Heating, Refrigerating and Air-Conditioning Engineers document titled “Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings,” 2010 (ANSI/ASHRAE Standard 62.2-2010 including ANSI/ASHRAE Addenda b, c, e, g, h, i and l to ANSI/ASHRAE 62.2-2010 published in the 2011 supplement, and ANSI/ASHRAE Addendum j to ANSI/ASHRAE Standard 62.2-2010 published in March, 2012, and ANSI/ASHRAE Addendum n to ANSI/ASHRAE Standard 62.2-2010 published in February, 2012).
is the American Society of Heating, Refrigerating and Air-Conditioning Engineers document titled “Method of Test for Determining the Airtightness of HVAC Equipment,” 2010 (ANSI/ASHRAE Standard 193-2010).
is the American Society of Mechanical Engineers.
is the American Society of Mechanical Engineers document titled “Handbook on Safety Code for Elevators and Escalators,” 2013 ( ASME Standard A17.1/CSAB44-2013).
is the American Society of Mechanical Engineers document titled “Plumbing Fixture Fittings,” 2011 ( ASME Standard A112.18.1-2011/CSA B125.1-11).
is the American Society for Testing and Materials International.
is the American Society for Testing and Materials document titled “Standard Specification for Concrete Brick,” 2014 ( ASTM C55-14).
is the American Society for Testing and Materials document titled “Standard Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Guarded-Hot-Plate Apparatus,” 2013 (ASTM C177-13).
is the American Society for Testing and Materials document titled “Standard Test Method for Water Absorption of Core Materials for Structural Sandwich Constructions,” 2012 ( ASTM C272-12).
is the American Society for Testing and Materials document titled “Standard Test Method for Steady-State Heat Transfer Properties of Horizontal Pipe Insulation,” 2010 ( ASTM C335-10).
is the American Society for Testing and Materials document titled “Standard Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus,” 2010 ( ASTM C518-10).
is the American Society for Testing and Materials document titled “Standard Test Method for Extrudability, After Package Aging of Latex Sealants,” 2010 ( ASTM C731-10).
is the American Society for Testing and Materials document titled “Standard Test Method for Aging Effects of Artificial Weathering on Latex Sealants,” 2006 ( ASTM C732-06 (2012).
is the American Society of Testing and Materials document titled, “Standard Specification for High Solids Content, Cold Liquid-Applied Elastomeric Waterproofing Membrane for Use with Separate Wearing Course,” 2012 ( ASTM C836/C836M-12).
is the American Society for Testing and Materials document titled “Standard Test Method for Determination of Emittance of Materials Near Room Temperature Using Portable Emissometers,” 2010 [ASTM C1371-04a(2010)].
is the American Society for Testing and Materials document entitled, “Standard Test Method for Determination of Solar Reflectance Near Ambient Temperature Using a Portable Solar Reflectometer,” 2014 [ASTM C1549-09 (2014)].
is the American Society of Testing and Materials document titled, “Standard Test Method for Tensile Strength of Concrete Surfaces and the Bond Strength or Tensile Strength of Concrete Repair and Overlay Materials by Direct Tension (Pull-off Method),” 2013 (ASTM C1583/C1583M-13).
is the American Society for Testing and Materials document titled, “Standard Classification for Sizes of Aggregate for Road and Bridge Construction,” 2012 ( ASTM D448-12).
is the American Society of Testing and Materials document titled, “Standard Test Methods for Mandrel Bend Test of Attached Organic Coatings,” 2013 ( ASTM D522/D522M-13).
is the American Society of Testing and Materials document titled, “Standard Practice for Filtered Open-Flame Carbon-Arc Exposures of Paint and Related Coatings,” 2013 ( ASTM D822/D822M-13).
is the American Society of Testing and Materials document titled, “Standard Test Methods for Water Vapor Transmission of Organic Coating Films,” 2013 ( ASTM D1653-13).
is the American Society of Testing and Materials document titled, “Standard Test Method for Tensile Properties of Organic Coatings,” 2010 [ ASTM D2370-98 (2010)].
is the American Society of Testing and Materials document titled “Standard Specification for Aluminum-Pigmented Asphalt Roof Coatings, Nonfibered, Asbestos Fibered, and Fibered without Asbestos,” 2013 (ASTM D2824/D2824M-13).
is the American Society of Testing and Materials document titled, “Standard Specification for Liquid-Applied Neoprene and Chlorosulfonated Polyethylene Used in Roofing and Waterproofing,” 2013 [ ASTM D3468/D3468M-99 (2013)].
is the American Society for Testing and Materials document titled “Standard Test Method for Accelerated Weathering Test Conditions and Procedures for Bituminous Materials (Xenon-Arc Method),” 2011 ( ASTM D4798/D4798M-11).
is the American Society of Testing and Materials document titled, “Standard Practice for Calculating Property Retention Index of Plastics,” 2011 ( ASTM D5870-11).
is the American Society of Testing and Materials document titled, “Standard Specification for Liquid Applied Acrylic Coating Used in Roofing,” 2005 ( ASTM D6083-05e1).
is the American Society of Testing and Materials document titled, “Standard Specification for Liquid-Applied Silicone Coating Used in Spray Polyurethane Foam Roofing,” 2013 [ ASTM D6694/D6694M-08 (2013)].
is the American Society of Testing and Materials document titled “Standard Specification for Aluminum-Pigmented Emulsified Asphalt Used as a Protective Coating for Roofing,” 2002 ( ASTM D6848-02).
is the American Society for Testing and Materials document titled “Standard Test Methods for Water Vapor Transmission of Materials,” 2014 ( ASTM E96/E96M-14).
is the American Society for Testing and Materials document titled “Standard Test Method for Determining the Rate of Air Leakage Through Exterior Windows, Curtain Walls, and Doors Under Specified Pressure Differences Across the Specimen,” 2012 [ASTM E283-04 (2012)].
is the American Society for Testing and Materials document titled, “Standard Test Methods for Total Normal Emittance of Surfaces Using Inspection-Meter Techniques,” 2013 ( ASTM E408-13).
is the American Society for Testing and Materials document titled, “Standard Test Method for Determining Air Leakage Rate by Fan Pressurization,” 2010 ( ASTM E779-10).
is the American Society for Testing and Materials document titled, “Standard Test Method for Solar Photometric Transmittance of Sheet Materials Using Sunlight,” 1996 [ ASTM E972-96 (2013)].
is the American Society for Testing and Materials document entitled, “Standard Test Method for Measuring Solar Reflectance of Horizontal and Low-Sloped Surfaces in the Field,” 2015 [ASTM E1918-06(2015)].
is the American Society for Testing and Materials document titled, “Standard Test Method for Air Permeance of Building Materials,” 2013 ( ASTM E21778-13).
is capable of operating without human intervention.
is any electronic information processing device which accepts or dispenses currency in connection with a credit, deposit or convenience account without involvement by a clerk. (ATM)
are those compressors not used to meet peak compressed air loads. Back-up compressors are physically connected to the compressed air piping system and can be automatically controlled to turn on if one of the online compressors fails. Back-up compressors do not normally operate.
is the liquid saturation temperature of a refrigerant at a specified pressure.
BUILDING is any structure or space covered by Section 100.0 of the Building Energy Efficiency Standards.
is a systematic quality assurance process that spans the entire design and construction process, including verifying and documenting that building systems and components are planned, designed, installed, tested, operated and maintained to meet the owner’s project requirements.
is a phone center that handles large number of phone calls including but not limited to help desk, customer and sales support, technical support, emergency response, telephone answering service, and inbound and outbound telemarketing.
is a central forced air heating and/or cooling system which is intended to operate on a regular basis to bring in outdoor ventilation air and/or distribute air around the home for comfort and ventilation even when heating and cooling are not needed.
means, when used in association with appliances, certified under Section 1606 of Title 20 of the California Code of Regulations; and otherwise means certified by the manufacturer in a declaration, executed under penalty of perjury under the laws of the State of California, that all the information provided pursuant to the certification is true, complete, accurate and in compliance with all applicable provisions of Part 6; and if applicable that the equipment, product or device was tested under the applicable test method specified in Part 6.
is the International Commission on Illumination (Commission Internationale de l’Eclairage) document titled “Method of Measuring and Specifying Colour Rendering Properties of Light Sources,” 1995 (CIE 13.3-1995).
are the 16 geographic areas of California for which the commission has established typical weather data, prescriptive packages and energy budgets. Climate zones are defined by ZIP code and listed in Reference Joint Appendix JA2. FIGURE 100.1-A is an approximate map of the 16 climate zones.
is a cooling tower that utilizes indirect contact between a heated fluid, typically water or glycol, and the cooling atmosphere to transfer the source heat load through sensible heat, latent heat and mass transfer indirectly to the air, essentially combining a heat exchanger and cooling tower into an integrated and relatively compact device.
is the California Building Code.
is the California Electrical Code.
is the California Mechanical Code.
is the California Plumbing Code.
COEFFICIENT OF PERFORMANCE (COP), COOLING, is the ratio of the rate of net heat removal to the rate of total energy input, calculated under designated operating conditions and expressed in consistent units, as determined using the applicable test method in the Appliance Efficiency Regulations or Section 110.2.
COEFFICIENT OF PERFORMANCE (COP), HEATING, is the ratio of the rate of net heat output to the rate of total energy input, calculated under designated operating conditions and expressed in consistent units, as determined using the applicable test method in the Appliance Efficiency Regulations or Section 110.2.
COEFFICIENT OF PERFORMANCE (COP), HEAT PUMP is the ratio of the rate of useful heat output delivered by the complete heat pump unit (exclusive of supplementary heating) to the corresponding rate of energy input, in consistent units and as determined using the applicable test method in Appliance Efficiency Regulations or Section 110.2.
is a means of restricting air flow through a boiler combustion chamber during standby periods, used to reduce standby heat loss. A flue damper and a vent damper are two examples of combustion air positive shut-off devices.
is a measure of the percentage of heat from the combustion of gas or oil that is transferred to the medium being heated or lost as jacket loss.
is a type of boiler with a capacity (rated maximum input) of 300,000 Btus per hour (Btu/h) or more and serving a space heating or water heating load in a commercial building.
is the California State Energy Resources Conservation and Development Commission.
are systems that include 1) fan systems each serving multiple thermostatically controlled zones; or 2) built-up air handler systems (nonunitary or nonpackaged HVAC equipment); or 3) hydronic or steam heating systems; or 4) hydronic cooling systems. Complex systems are NOT the following: (a) unitary or packaged equipment listed in Tables 110.2-A, 110.2-B, 110.2-C and 110.2-E that each serve one zone, or (b) two-pipe, heating only systems serving one or more zones.
is a system of at least one compressor providing compressed air at 40 psig or higher.
is the full load condenser Total Heat of Rejection (THR) capacity at standardized conditions divided by the fan input electric power (including but not limited to spray pump electric input power for evaporative condensers) at 100 percent rated fan speed.
is the (CFA) floor area (in square feet) of enclosed conditioned space on all floors of a building, as measured at the floor level of the exterior surfaces of exterior walls enclosing the conditioned space.
is space in a building that is either directly conditioned or indirectly conditioned.
is an enclosed space that is provided with wood heating, is provided with mechanical heating that has a capacity exceeding 10 Btu/hr-ft2) or is provided with mechanical cooling that has a capacity exceeding 5 Btu/hr-ft2, unless the space-conditioning system is designed for process space or process load. (See “process load” and “process space.”)
is enclosed space, including, but not limited to, unconditioned volume in atria, that (1) is not directly conditioned space; and (2) either (a) has a thermal transmittance area product (UA) to directly conditioned space exceeding that to the outdoors or to unconditioned space and does not have fixed vents or openings to the outdoors or to unconditioned space, or (b) is a space through which air from directly conditioned spaces is transferred at a rate exceeding three air changes per hour.
is the total volume (in cubic feet) of the conditioned space within a building.
(c.i.) is insulation that is continuous across all assemblies that separate conditioned from unconditioned space. It is installed on the exterior or interior or is integral to any opaque surface of the building envelope and has no thermal bridges other than fasteners and necessary service openings.
is an airtight space maintained at reduced oxygen levels for the purpose of reducing respiration of perishable product in long-term storage.
is a space to be capable of operation at a temperature greater than or equal to 28°F but less than 55°F.
is a roofing material with high thermal emittance and high solar reflectance, or low thermal emittance and exceptionally high solar reflectance as specified in Part 6 that reduces heat gain through the roof.
is a space immediately under the first floor of a building adjacent to grade.
CTI is the Cooling Technology Institute.
is the Cooling Technology Institute document titled “Acceptance Test Code for Water Cooling Towers,” 2000 ( CTI ATC-105-00).
is the actual cubic feet per minute (acfm) of total air flow necessary for end uses in a compressed air system.
(also known as C-factor) is the time rate of heat flow through unit area of a body induced by a unit temperature difference between the body surfaces, in Btu (hr × ft2 × °F). It is not the same as K-value or K-factor.
is the number of times the concentration of total dissolved solids (TDS) in cooling tower water is multiplied relative to the TDS in the makeup water. Because evaporation of pure water leaves dissolved solids behind in the system water, TDS increases over time as the tower operates. The number of times the dissolved minerals are concentrated is relative to the TDS in the makeup water. For example, five cycles of concentration represents five times the concentration of solids in the cooling tower system water relative to the TDS in the makeup water entering the tower.
is a building whose primary function is to house computer room(s).
is the temperature range within which the HVAC system is neither calling for heating or cooling.
is a gas appliance that is designed or installed for visual effect only, cannot burn solid wood, and simulates a fire in a fireplace.
is a unit, based upon temperature difference and time, used in estimating fuel consumption and specifying nominal annual heating load of a building. For any one day, when the mean temperature is less than 65°F, there exist as many degree days as there are Fahrenheit degrees difference in temperature between the mean temperature for the day and 65°F. The number of degree days for specific geographical locations are those listed in the Reference Joint Appendix JA2. For those localities not listed in the Reference Joint Appendix JA2, the number of degree days is as determined by the applicable enforcing agency.
is short-term changes in electricity usage by end-use customers from their normal consumption patterns. Demand response may be in response to:
- changes in the price of electricity; or
- in response to wholesale market prices or
- when system reliability is jeopardized.
is a period of time during which electricity loads are modified in response to a demand response signal.
is a signal sent by the local utility, Independent System Operator (ISO), or designated curtailment service provider or aggregator, to a customer, indicating a price or a request to modify electricity consumption, for a limited time period.
is a kind of control that is capable of receiving and automatically responding to a demand response signal.
are the parameters and conditions used to determine the performance requirements of space-conditioning systems. Design conditions for determining design heating and cooling loads are specified in Section 140.4(b) for nonresidential, high-rise residential, and hotel/motel buildings and in Section 150.0(h) for low-rise residential buildings.
is an additional review of the construction documents (drawings and specifications) that seeks to improve compliance with existing Title 24 regulations, to encourage adoption of best practices in design, and to encourage designs that are constructable and maintainable. It is an opportunity for an experienced design engineer or architect to look at a project with a fresh perspective in an effort to catch missing or unclear design information and to suggest design enhancements.
is the vapor saturation temperature at a specified pressure for a substance undergoing phase change from vapor to liquid.
is a type of control where controlled and monitored analog or binary data, such as temperature and contact closures, are converted to digital format for manipulation and calculations by a digital computer or microprocessor, then converted back to analog or binary form to control mechanical devices. (DDC)
or “sealed combustion” appliance is an appliance that is constructed and installed so that air from combustion is derived directly from the outdoors and flue gases are discharged to the outdoors.
is the length of an exterior wall in a Group B; Group F, Division 1; or Group M Occupancy that immediately abuts a public sidewalk, measured at the sidewalk level for each story that abuts a public sidewalk.
is an operable opening in the building envelope including swinging and roll-up doors, fire doors, pet doors and access hatches with less than 50 percent glazed area. When that operable opening has 50 percent or more glazed area it is a glazed door. See Fenestration: Glazed Door.
is a procedure for installing a space-conditioning distribution system that minimizes leakage of air from or to the distribution system. Minimum specifications for installation procedures, materials, diagnostic testing and field verification are contained in the Reference Residential Appendix RA3 and Reference Nonresidential Appendix NA1.
is all the ducts, duct fittings, plenums and fans when assembled to form a continuous passageway for the distribution of air.
is an air conditioner or heat pump, either a split system or single-packaged unit, that is designed to be permanently installed equipment and delivers conditioned air to an indoor space through a duct.
is a building that contains one or two dwelling units used, intended or designed to be used, rented, leased, let or hired out to be occupied for living purposes.
is a single unit providing complete, independent living facilities for one or more persons including access, permanent provisions for living, sleeping, eating, cooking and sanitation.
is a ducting arrangement, including dampers, linkages and an automatic control system that allows a cooling supply fan system to supply outside air to reduce or eliminate the need for mechanical cooling.
is a system by which the supply air of a cooling system is cooled directly or indirectly by evaporation of water, or other appropriate fluid, in order to reduce or eliminate the need for mechanical cooling.
A general term, including devices, . luminaires, apparatus, machinery, and the like used as a part of, or in connection with, an electrical installation.
is the energy consumed by any appliances or electronic device that is plugged into a receptacle or receptacle outlet. Plug loads are not related to general lighting, heating, ventilation, cooling, and water heating, domestic and service water system, renewable power, information technology equipment, computer room electronic equipment, and electric vehicle charging.
is a device or system for measuring the electrical power and energy supplied to a customer or premise(s).
is a distribution transformer that has an input voltage of 600 volts or less, that is air-cooled, and that does not use oil as a coolant.
is the conductors and equipment for delivering electric energy from the serving utility to the wiring system of the premise served.
is the necessary equipment, usually consisting of a circuit breaker(s) or switch(es) and fuse(s) and their accessories, connected to the load end of service conductors to a building or other structure, or an otherwise designated area, and intended to constitute the main control and cutoff of the supply.
is a brushless DC motor with a permanent magnet rotor that is surrounded by stationary motor windings, and an electronic controller that varies rotor speed and direction by sequentially supplying DC current to the windings.
is the ratio of the radiant heat flux emitted by a sample to that emitted by a blackbody radiator at the same temperature.
is the maximum amount of Time Dependent Valuation (TDV) energy that a proposed building, or portion of a building, can be designed to consume, calculated with the approved procedures specified in Part 6.
is the California State Energy Resources Conservation and Development (CEC) Commission.
is the ratio of net cooling capacity (in Btu/hr) to total rate of electrical energy input (in watts), of a cooling system under designated operating conditions, as determined using the applicable test method in the (EER) Appliance Efficiency Regulations or Section 110.2.
of a water heater is a measure of overall water heater efficiency as determined using the applicable test method in the (EF) Appliance Efficiency Regulations.
is a computerized control system designed to regulate the energy consumption of a building by controlling the operation of energy consuming systems, such as the heating, ventilation and air conditioning (HVAC), (EMCS) lighting, and water heating systems, and is capable of monitoring environmental and system loads, and adjusting HVAC operations in order to optimize energy usage and respond to demand response signals.
is electricity purchased from a public utility, or any energy obtained from coal, oil, natural gas or liquefied petroleum gases.
is energy that is not energy obtained from depletable sources.
is the city, county or state agency responsible for issuing a building permit.
(See “ Building envelope.”)
is an opaque, translucent or transparent solid barrier that separates conditioned space from ambient air or space. For low-rise residential occupancies, exterior partitions also include barriers that separate conditioned space from unconditioned space, or the ground.
is the area of the exterior surface of exterior roof/ceilings.
is any wall or element of a wall, or any member or group of members, which defines the exterior boundaries or courts of a building and which has a slope of 60 degrees or greater with the horizontal plane. An exterior wall or partition is not an exterior floor/soffit, exterior door, exterior roof/ceiling, window, skylight or demising wall.
is the area of the opaque exterior surface of exterior walls.
is the contiguous exterior of a building surface, but not limited to fenestration products.
are cooling towers constructed from factory-assembled modules either shipped to the site in one piece or put together in the field.
Includes the following:
ACE is an NFRC-Approved Calculation Entity that conducts calculations of fenestration product ratings for certification authorization using the NFRC component modeling approach and issues label certificates to Specifying Authorities for product certification authorization in accordance with NFRC requirements.
is a combination assembly which is composed of three or more individual windows either joined side by side or installed within opaque assemblies and which projects away from the wall on which it is installed. Center windows, if used, are parallel to the wall on which the bay is installed, the end panels or two side windows, are angled with respect to the center window. Common angles are 30° and 45°, although other angles may be employed.
CMA (component modeling approach) is a fenestration product certification program from the National Fenestration Rating Council (NFRC) that enables energy-related performance ratings for nonresidential fenestration products, including the thermal performance U-factor, solar heat gain coefficient, and visible transmittance.
is an NFRC approved software that allows a user to create a (component modeling approach software tool) fenestration product “virtually” and generate its energy-related performance ratings, including the thermal performance U-factor, solar heat gain coefficient, and visible transmittance.
is an external non- bearing wall intended to separate the exterior nonconditioned and interior conditioned spaces. It also consists of any combination of framing materials, fixed glazing, opaque glazing, operable windows or other in-fill materials.
DOOR is an operable opening in the building envelope, including swinging and roll-up doors, fire doors, pet doors and access hatches with less than 50 percent glazed area. When that operable opening has 50 percent or more glazed area it is a glazed door. See Fenestration: Glazed Door.
are glazing systems that have the ability to reversibly change their performance properties, including U-factor, Solar Heat Gain Coefficient (SHGC) and/or Visible Transmittance (VT) between well-defined end points. These may include, but are not limited to, chromogenic glazing systems and integrated shading systems (defined below). Dynamic Glazing systems do not include internally mounted or externally mounted shading devices that attach to the window framing/glazing that may or may not be removable.
is a class of switchable glazing that includes active materials (e.g., electrochromic) and passive materials (e.g., photochromic and thermochromic) permanently integrated into the glazing assembly. Their primary function is to switch reversibly from a high transmission state to a low transmission state with associated changes in VT and SHGC.
is a class of fenestration products including an active layer: e.g., shades, louvers, blinds or other materials permanently integrated between two or more glazing layers. The U-factor and/or SHGC and VT of the insulating glass assembly can be altered by reversibly changing the enclosed active layer.
is any transparent or translucent material plus any sash, frame, mullions and dividers, in the facade of a building, including, but not limited to, windows, sliding glass doors, French doors, skylights, curtain walls, dynamic glazing, garden windows and glass block.
is the reconstruction or renewal for the purpose of maintenance of any fenestration product, component or system and shall not increase the preexisting energy consumption of the repaired fenestration product, component, system or equipment. Replacement of any component, system or equipment for which there are requirements in the Standards are considered an alteration (see Fenestration, alteration) and not a repair and is subject to the requirements of Part 6 of the Standards.
is a fenestration product whose frame is made at the construction site of standard dimensional lumber or other materials that were not previously cut, or otherwise formed with the specific intention of being used to fabricate a fenestration product. Field fabricated does not include site-built fenestration.
Fin is an opaque surface, oriented vertically and projecting outward horizontally from an exterior vertical surface.
is fenestration that is not designed to be opened or closed.
is a or fenestration product constructed of materials that are factory cut or otherwise factory formed with the specific intention of being used to fabricate a fenestration product. Knocked down or partially assembled products may be sold as a fenestration product when provided with temporary and permanent labels as described in Section 10-111, or as a site-built fenestration product when not provided with temporary and permanent labels as described in Section 10-111.
is the National Fenestration Rating Council document titled “NFRC 200: Procedure for Determining Fenestration Product Solar Heat Gain Coefficients and Visible Transmittance at Normal Incidence,” 2014.
is a device at the interior or exterior of a building or integral with a fenestration product, which is capable of being operated, either manually or automatically, to adjust the amount of solar radiation admitted to the interior of the building.
is the ratio of solar heat gain through a (RSHGC) fenestration product (corrected for external shading) to the incident solar radiation. Solar heat gain includes directly transmitted solar heat and absorbed solar radiation, which is then reradiated, conducted or convected into the space.
is fenestration designed to be field-glazed or field assembled units using specific factory cut or otherwise factory formed framing and glazing units that are manufactured with the intention of being assembled at the construction site. These include storefront systems, curtain walls and atrium roof systems.
is the ratio of the solar heat gain entering the space through the (SHGC) fenestration area to the incident solar radiation. Solar heat gain includes directly transmitted solar heat and absorbed solar radiation, which is then reradiated, conducted or convected into the space.
is colored glass by incorporation of a mineral admixture resulting in a degree of tinting. Any tinting reduces both visible and radiant transmittance.
is the area of the surface of a window, plus the area of the frame, sash and mullions.
are cooling towers which are custom designed for a specific application and which cannot be delivered to a project site in the form of factory assembled modules due to their size, configuration, or materials of construction.
is a hearth and fire chamber, or similar prepared place, in which a fire may be made and which is built in conjunction with a flue or chimney, including but not limited to factory-built fireplaces, masonry fireplaces, and masonry heaters as further clarified in the CBC.
is a fan-powered heat rejection device that includes a water or glycol circuit connected by a closed circulation loop to a liquid-cooled refrigerant condenser, and may be either evaporative-cooled, or air-cooled, or a combination of the two.
is the rate of energy flow per unit area.
is cooking equipment intended for commercial use, including coffee machines, espresso coffee makers, conductive cookers, food warmers including heated food servers, fryers, griddles, nut warmers, ovens, popcorn makers, steam kettles, ranges and cooking appliances for use in commercial kitchens, restaurants or other business establishments where food is dispensed.
is a space designed to be capable of operation at less than 28°F.
is a system that uses natural gas or liquefied petroleum gas as a fuel to heat a conditioned space.
is a self-contained, free-standing, open-flame, gas-burning appliance consisting of a metal frame or base supporting simulated logs, and designed for installation only in a vented fireplace.
(See “ fenestration product.”)
is the radiative forcing impact of one mass-based unit of a given (GWP) greenhouse gas relative to an equivalent unit of carbon dioxide over a given period of time.
is the 100-year GWP value published by the Intergovernmental Panel on Climate Change (IPCC) in either its Second Assessment Report (SAR) (IPCC, 1995), or its Fourth Assessment A-3 Report (AR4) (IPCC, 2007). Both the 1995 IPCC SAR values and the 2007 IPCC AR4 values are published in Table 2.14 of the 2007 IPCC AR4. The SAR GWP values are found in column “SAR (100-yr)” of Table 2.14.; the AR4 GWP values are found in column “100 yr” of Table 2.14. (GWP Value)
is any public agency or subdivision thereof, including, but not limited to, any agency of the state, a county, a city, a district, an association of governments or a joint power agency.
is a story that contains space in which humans may work or live in reasonable comfort, and that has at least 50 percent of its volume above grade.
or thermal capacity is the measurable physical quantity that characterizes the amount of heat required to change a substance’s temperature by a given amount. (HC)
is an appliance that consists of one or more assemblies; that uses an indoor conditioning coil, a compressor, and a refrigerant-to- outdoor air heat exchanger to provide air heating; and that may also provide air cooling, dehumidifying, humidifying, circulating, or air cleaning.
is a concrete floor either on-grade, raised, or a lightweight concrete slab topping. Heating is provided by a system placed within or under the slab and is sometimes referred to as a radiant slab floor.
is the total heating output of a central air-conditioning (HSPF) heat pump (in Btu) during its normal use period for heating divided by the total electrical energy input (in watt-hours) during the same period, as determined using the applicable test method in the Appliance Efficiency Regulations.
HI is the Hydronics Institute of the Gas Appliance Manufacturers Association (GAMA).
is the Hydronics Institute document entitled “Testing and Rating Standard for Rating Boilers,” 1989.
is a building or buildings that has six or more guest rooms or a lobby serving six or more guest rooms, where the guest rooms are intended or designed to be used, or which are used, rented or hired out to be occupied, or which are occupied for sleeping purposes by guests, and all conditioned spaces within the same building envelope. Hotel/motel also includes all conditioned spaces which are (1) on the same property as the hotel/motel, (2) served by the same central heating, ventilation and air-conditioning system as the hotel/motel, and (3) integrally related to the functioning of the hotel/motel as such, including, but not limited to, exhibition facilities, meeting and conference facilities, food service facilities, lobbies and laundries.
is a space-conditioning system or a ventilation system.
(See “IES Lighting Handbook.”)
is the Illuminating Engineering Society document titled “The IES Lighting Handbook: Reference and Applications, Tenth Edition,” 2011.
is the Illuminating Engineering Society document titled, “IES Approved Method for the Electrical and Photometric Measurements of Solid-State Lighting Products.”
is uncontrolled inward air leakage from outside a building or unconditioned space, including leakage through cracks and interstices, around windows and doors, and through any other exterior or demising partition or pipe or duct penetration. See AIR BARRIER.
is a single-number cooling part-load efficiency figure of (IEER) merit calculated as specified by the method described in ANSI/AHRI Standard 340/360/1230. This metric replaces the IPLV for ducted and non-ducted units.
is the International Organization for Standardization document titled “General Criteria for the Competence of Testing and Calibration Laboratories,” 2005 ( ANSI/ISO/IEC Standard 17025:2005).
is expressed as the difference between the actual system pH and the saturation pH. LSI indicates whether water will precipitate, dissolve or be in equilibrium with calcium carbonate, and is a function of hardness, alkalinity, conductivity, pH and temperature. (LSI)
is the largest increase in capacity when switching between combinations of base compressors that is expected to occur under the compressed air system control scheme.
is a ceiling-mounted, close-to-ceiling or suspended decorative luminaire that uses glass, crystal, ornamental metals or other decorative material.
is the ability of a (CRI) light source to reflect the color of illuminated objects with fidelity relative to ideal or natural light sources of the same color temperature. CRI is calculated according to CIE 13.3.
is a light source designed and marketed as a colored light source and not designed or marketed for general lighting applications with either of the following characteristics maintained throughout all modes of operation including color changing operation:
is a fluorescent lamp less than nine inches maximum overall length with a T5 or smaller diameter glass tube that is folded, bent or bridged.
is installed electric lighting that provides a uniform level of illumination throughout an area, exclusive of any provision for special visual tasks or decorative effect, exclusive of daylighting, and also known as ambient lighting.
is the designation of a lamp holder and socket configuration, based on a coding system by the International Energy Consortium, where “G” indicates the broad type of two or more projecting contacts, such as pins or posts, “U” distinguishes between lamp and holder designs of similar type but that are not interchangeable due to electrical or mechanical requirements, and “24” indicates 24 millimeters center to center spacing of the electrical contact posts.
is the area density of the luminous flux incident at a point on a surface.
is light incident on a surface of body, or the general condition of being illuminated.
Inseparable Solid State Lighting (SSL) Luminaire is a luminaire featuring solid state lighting components such as LEDs and driver components which cannot be easily removed or replaced by the end user, thus requiring replacement of the entire luminaire. Removal of solid state lighting components may require the cutting of wires, use of a soldering iron, or damage to or destruction of the luminaire.
is the process of adjusting the maximum light output of lighting systems to support visual needs or save energy. Institutional tuning differs from personal tuning in that the control strategy is implemented at the institutional rather than the individual user level, and maximum light level adjustments are available only to authorized personnel.
is an electrical appliance that produces optical radiation for the purpose of visual illumination, designed with a base to provide an electrical connection between the lamp and a luminaire, and designed to be installed into a luminaire by means of a lamp-holder integral to the luminaire.
is a type of outdoor lighting that is recessed into or mounted on the ground, paving or raised deck, which is mounted less than 42 inches above grade or mounted onto trees or trellises, and that is intended to be aimed only at landscape features.
is the luminous equivalent of power and is properly called luminous flux.
is a p-n junction solid state diode whose radiated output is a function of its physical construction, material used and exciting current. The output may be in the near ultraviolet, the visible or in the infrared regions of the spectrum. (LED)
is an integrated assembly comprised of LED packages, LED components, LED arrays, LED modules, or LED driver, and other optical, thermal, mechanical and electrical components. The device is intended to connect directly to the branch circuit through a custom connector compatible with the LED luminaire for which it was designed and does not use an ANSI standard base (IES RP-16-10).
is an assembly comprised of an LED array (module) or LED packages (components) and ANSI standard base. The device is intended to connect to the LED driver of an LED luminaire through an ANSI standard lamp-holder (socket). The device cannot be connected to the branch circuit (ANSI/IES RP-16-10).
is an integrated assembly comprised of LED packages (components) or LED arrays (modules), LED driver, ANSI standard base and other optical, thermal, mechanical and electrical components. The device is intended to connect directly to the branch circuit via a corresponding ANSI standard lamp-holder (socket) (ANSI/IES RP-16-10).
is less than 90 volts.
is a complete lighting unit consisting of a light source such as a lamp or lamps, together with the parts that distribute the light, position and protect the light source and connect it to the power supply.
is a permanent lighting system consisting of one or more rows of many small lamps, including light emitting diodes (LEDs) lamps, tungsten lamps, low pressure discharge lamps or fiber optic lighting, attached to a canopy.
for compliance with Part 6 is the following:
installed indoor that are chandeliers, sconces, lanterns, neon and cold cathode, light emitting diodes, theatrical projectors, moving lights and light color panels, not providing general lighting or task lighting.
A (Suspended) luminaire that is hung from a ceiling by supports.
consists of luminaires that are affixed to land, within the meaning of Civil Code Sections 658 and 660, except as provided below. Permanently installed luminaires may be mounted inside or outside of a building or site. Permanently installed luminaires may have either plug-in or hardwired connections for electric power. Examples include track and flexible lighting systems; lighting attached to walls, ceilings, columns, inside or outside of permanently installed cabinets, internally illuminated cabinets, mounted on poles, in trees, or in the ground; attached to ceiling fans and integral to exhaust fans. Permanently installed lighting does not include portable lighting or lighting that is installed by the manufacturer in exhaust hoods for cooking equipment, refrigerated cases, food preparation equipment, and scientific and industrial equipment.
is lighting, with plug-in connections for electric power, that is: table and freestanding floor lamps; attached to modular furniture; workstation task luminaires; luminaires attached to workstation panels; attached to movable displays; or attached to other personal property.
is task lighting for commercial or industrial work that illuminates low contrast, finely detailed, or fast moving objects.
is the time-rate-flow of radiant energy.
is energy travelling in the form of electromagnetic waves. It is measured in units of energy such as joules or kilowatt hours.
light) is the general term used to reference a (source of light. It can refer variously to an electric lamp, a light emitting diode (LED), an entire luminaire with lamp and optical control, or fenestration for daylighting.
is a lighting installation, with plug-in connections, that does not persist beyond 60 consecutive days or more than 120 days per year.
is equipped with remote transformers for use with low-voltage equipment along the entire length of track.
is a panelboard containing Supplementary Overcurrent Protection Devices as defined in Article 100 of the California Electrical Code, and used only with line voltage track lighting.
consist of the following:
adjusts the luminous flux of the electric lighting system in either a series of steps or by continuous dimming in response to available daylight. This kind of control uses one or more photosensors to detect changes in daylight illumination and then automatically adjusts the electric lighting levels in response.
controls lighting based on the time of day.
means a dimmer that varies the luminous flux of the electric lighting system over a continuous range from the device’s maximum light output to the device’s minimum light output without visually apparent abrupt changes in light level between the various steps.
varies the luminous flux of the electric lighting system in one or more predetermined discrete steps between maximum light output and OFF with changes in light level between adjacent steps being visually apparent.
requires two or more components to be installed in the building to provide all of the functionality required to make up a fully functional and compliant lighting control.
is an astronomical time switch control that reduces lighting power in multiple steps.
reduces power going to a lighting system in multiple steps.
automatically turns lights ON and OFF, or automatically adjusts lighting levels, in response to the amount of daylight that is available. A photo control may also be one component of a field assembled lighting system, the component having the capability to provide a signal proportional to the amount of daylight to a lighting control system to dim or brighten the electric lights in response.
LISTED is in accordance with Article 100 of the California Electrical Code.
is a compound used as a heat transfer fluid or gas that is: (A) any compound or blend of compounds, with a GWP Value less than 150; and (B) U.S. EPA Significant New Alternatives Policy (SNAP)-approved; and (C) not an ozone depleting substance as defined in Title 40 of the Code of Federal Regulations, Part 82, §82.3 (as amended March 10, 2009).
is a building, other than a hotel/motel that is Occupancy Group:
- R-2, multi-family, with three stories or less; or
- R-3, single family; or
- U-building, located on a residential site.
LPG is liquefied petroleum gas.
is outdoor air that is intentionally conveyed by openings or ducts into the building from the outside; is supplied to the vicinity of an exhaust hood; and replaces air, vapor and contaminants being exhausted by the exhaust hood. Makeup air is generally filtered and fan-forced, and it may be heated or cooled. Makeup air may be delivered through openings or ducts integral to the exhaust hood.
is capable of being operated by personal intervention.
is any heating, cooling, ventilation, lighting, water heating, refrigeration, cooking, plumbing fitting, insulation, door, fenestration product, or any other appliance, device, equipment, or system subject to Sections 110.0 through 110.9 of Part 6.
is lowering the temperature within a space using refrigerant compressors or absorbers, desiccant dehumidifiers or other systems that require energy from depletable sources to directly condition the space. In nonresidential, high-rise residential and hotel/motel buildings, cooling of a space by direct or indirect evaporation of water alone is not considered mechanical cooling.
is raising the temperature within a space using electric resistance heaters, fossil fuel burners, heat pumps or other systems that require energy from depletable sources to directly condition the space.
is the minimum efficiency reporting value as determined by ASHRAE Standard 52.2 Method of Testing General Ventilation Air-Cleaning Devices for Removal Efficiency by Particle Size.
is a complete integrated set of mutually dependent components and assemblies that form a building, which consists of a steel-framed superstructure and metal skin. This does not include structural glass or metal panels such as in a curtainwall system.
is an air-cooled condenser for refrigeration systems which utilizes multiple small parallel gas flow passages in a flat configuration with fin surfaces bonded between the parallel gas passages.
are the conditions (such as weather conditions, thermostat settings and schedules, internal gain schedules, etc.) that are used for calculating a building’s annual energy consumption as specified in the Alternative Calculation Methods (ACM) Approval Manuals.
are air conditioner or heat pump systems that have two or more indoor sections. The indoor sections operate independently and can be used to condition multiple zones in response to multiple indoor thermostats.
is an air distribution system that supplies air to more than one space conditioning zone, each of which has one or more devices (such as dampers, cooling coils and heating coils) that regulate airflow, cooling or heating capacity to the zone.
is the exhaust flow rate for a hood, minus any internal discharge makeup air flow rate.
is any space being converted from unconditioned to directly conditioned or indirectly conditioned space. Newly conditioned space must comply with the requirements for an addition. See Section 141.0 for nonresidential occupancies and Section 150.2 for residential occupancies.
is a building that has never been used or occupied for any purpose.
is an air conditioner or heat pump that is permanently installed; directly heats or cools air within the conditioned space; and uses one or more indoor coils that are mounted on walls or ceilings within the conditioned space. The system may be of a modular design that allows for combining multiple outdoor coils and compressors to create one unified system.
is any building which is identified in the California Building Code Table; Description of Occupancy as Group A, B, E, F, H, M, or S; and is a U; as defined by Part 2 of Title 24 of the California Code or Regulation.
are building types in which a minimum of 90 percent of the building floor area functions as one of the following, which do not qualify as any other Building Occupancy Types more specifically defined in Section 100.1, and which do not have a combined total of more than 10 percent of the area functioning of any Nonresidential Function Areas specifically defined in Section 100.1:
is a building for an educational institution in which a minimum of 90 percent of the building floor area are classrooms or educational laboratories.
is a building for which a minimum or 90 percent of the building floor area is used for storing items.
is a building in which a minimum of 90 percent of the building floor area are rooms used for an institution which collects funds from the public and places them in financial assets such as deposits, loans, and bonds.
is a building in which a minimum of 90 percent of the building floor area are rooms for performing a craft, assembly or manufacturing operation.
is a building in which a minimum of 90 percent of the building floor area are rooms used as a repository of literary materials kept for reading or reference, such as books, periodicals, newspapers, pamphlets and prints.
are non “I” occupancy buildings in which a minimum of 90 percent of the building floor area are rooms where medical or clinical care is provided, does not provide overnight patient care, and is used to provide physical and mental care through medical, dental or psychological examination and treatment.
is a building of CBC Group B Occupancy in which a minimum of 90 percent of the building floor area are rooms in which business, clerical or professional activities are conducted.
is a building in which a minimum of 90 percent of the building floor area is for the purpose of parking vehicles, which consists of at least a roof over the parking area enclosed with walls on all sides. The building includes areas for vehicle maneuvering to reach designated parking spaces. If the roof of a parking structure is also used for parking, the section without an overhead roof is considered an outdoor parking lot instead of a parking garage.
is a building in which a minimum of 90 percent of the building floor area are rooms in which food and drink are prepared and served to customers in return for money.
is a building in which a minimum of 90 percent of the building floor area is used for an educational institution, but in which less than 90 percent of the building floor area is classrooms or educational laboratories and may include an auditorium, gymnasium, kitchen, library, multipurpose room, cafeteria, student union or workroom. A maintenance or storage building is not a school building.
is a building in which a minimum of 90 percent of the building floor area are rooms having tiers of rising seats or steps for the viewing of motion pictures, or dramatic performances, lectures, musical events and similar live performances.
is the manual developed by the Commission, under Section 25402.1(e) of the Public Resources Code, to aid designers, builders and contractors in meeting the energy efficiency requirements for nonresidential, high-rise residential and hotel/motel buildings.
is the passage or walkway between storage racks permanently anchored to the floor in a Commercial or Industrial Storage Building, where the racks are used to store materials such as goods and merchandise.
is a large-volume indoor space created by openings between two or more stories but is not used for an enclosed stairway, elevator hoistway, escalator opening or utility shaft for plumbing, electrical, air-conditioning or other equipment.
is a room with fixed seats used for public meetings or gatherings.
is a room or area in which the primary activity is manicures, pedicures, facials, or the cutting or styling of hair.
is a space in a government building designed or used for public debate, discussion or public meetings of governmental bodies.
is a room or area where an audience or class receives instruction.
is a room or area used for storing of items such as goods and merchandise.
Commercial and industrial storage area (refrigerated) is a room or area used for storing items where mechanical refrigeration is used to maintain the space temperature at 55°F or less.
is a passageway or route into which compartments or rooms open.
is a room or area where meals that are served to the customers will be consumed.
is a room in which the building’s electrical switchbox or control panels, telephone switchbox, and/or HVAC controls or equipment is located.
is a room or area equipped for gymnastics, exercise equipment or indoor athletic activities.
is a room or area in a museum that has for its primary purpose exhibitions, having neither fixed seating nor fixed staging. An exhibit does not include a gallery or other place where art is for sale. An exhibit does not include a lobby, conference room or other occupancies where the primary function is not exhibitions.
is a room or area used by an institution that collects funds from the public and places them in financial assets such as deposits, loans and bonds, and includes tellers, work stations and customers’ waiting areas; to complete financial transactions. Financial transaction areas do not include private offices, hallways, restrooms or other support areas.
is a room or area in which an art, craft, assembly or manufacturing operation is performed. Lighting installed in these areas is classified as follows:
Where visual tasks of small size or fine detail such as electronic assembly, fine woodworking, metal lathe operation, fine hand painting and finishing, egg processing operations or tasks of similar visual difficulty are performed. :
is a room or area that has as its primary purpose the sale of foodstuffs requiring additional preparation prior to consumption.
is a room or area with cooking facilities or an area where food is prepared.
is a room or area where research, experiments and measurement in medical and physical sciences are performed requiring examination of fine details. The area may include workbenches, countertops, scientific instruments and associated floor spaces. Scientific laboratory does not refer to film, computer and other laboratories where scientific experiments are not performed.
is a room or area primarily designed or used for laundering activities.
is a room or area primarily designed or used as a repository for literary materials such as books, periodicals, newspapers, pamphlets and prints, kept for reading or reference.
is a room or area in a library containing tables, chairs or desks for patrons to use for the purpose of reading books and other reference documents. Library reading areas include reading, circulation and checkout areas. Reading areas do not include private offices, meeting, photocopy or other rooms not used specifically for reading by library patrons.
is a room or area in a library with grouping of shelving sections. Stack aisles include pedestrian paths located in stack areas.
is the contiguous area in a hotel/motel between the main entrance and the front desk, including reception, waiting and seating areas.
is the contiguous area in buildings other than hotel/motel that is directly located by the main entrance of the building through which persons must pass, including any ancillary reception, waiting and seating areas.
is a room or area for changing clothing, sometimes equipped with lockers.
is a room or area in a public place such as a hotel, airport, club or bar designated for people to sit, wait and relax.
is a roofed or covered common pedestrian area within a mall building that serves as access for two or more tenants.
is a non “I” occupancy room or area in a building that does not provide overnight patient care and that is used to provide physical and mental care through medical, dental or psychological examination and treatment, including, but not limited to, laboratories and treatment spaces.
is a room or area in which the primary function is the care of exhibit of works of artistic, historical or scientific value. A museum does not include a gallery or other place where art is for sale. A museum does not include a lobby, conference room or other occupancies where the primary function is not the care or exhibit of works of artistic, historical or scientific value.
is a room or area in a building of CBC Group B Occupancy in which business, clerical or professional activities are conducted.
is a warehouse facility term describing a large unobstructed area that is typically used for the handling and temporary storage of goods.
include the following:
are the areas of a Parking Garage used for the purpose of parking and maneuvering of vehicles on a single floor. Parking areas include sloping floors of a parking garage. Parking areas do not include Daylight Transition Zones, Dedicated Ramps, or the roof of a Parking Garage, which may be present in a Parking Garage.
in a Parking Garage is the interior path of travel for vehicles to enter a parking garage as needed to transition from exterior daylight levels to interior light levels. Daylight Transition Zones only include the path of vehicular travel and do not include adjacent Parking Areas.
in parking garages are driveways specifically for the purpose of moving vehicles between floors of a parking garage and which have no adjacent parking. Dedicated ramps do not include sloping floors of a parking structure, which are considered Parking Areas.
is a room or area in which the primary function is for an assembly of people to worship. Religious worship does not include classrooms, offices or other areas in which the primary function is not for an assembly of people to worship.
is a room providing personal facilities such as toilets and washbasins.
is a room or area in which the primary activity is the sale of merchandise.
is a room smaller than 500 square feet, within a larger building, in which networking equipment and Information Technology (IT) server equipment is housed, and a minimum of five IT servers are installed in frame racks.
is a series of steps providing passage for persons from one level of a building to another, including escalators.
is a vertical shaft in which stairs are located.
is a room or area used as a passageway, utility room, storage space or other type of space associated with or secondary to the function of an occupancy that is listed in these regulations.
is a room or area in a building intended for lease for which a specific tenant is not identified at the time of building permit application.
include the following:
is an assembly room or area with tiers of rising seats or steps for the showing of motion pictures.
is an assembly room or area with tiers of rising seats or steps for the viewing of dramatic performances, lectures, musical events and similar live performances.
is the ticketing area, waiting area, baggage handling areas, concourse in an airport terminal, bus or rail terminal or station, subway or transit station, or a marine terminal.
is a room or area used to provide training in a special skill to be pursued as a trade.
is a room or area where samples of merchandise are displayed.
is a single-number part-load efficiency figure of merit for chillers referenced to conditions other than IPLV conditions. (See “integrated part load value.”) (NPLV)
is any enclosed space inside the pressure boundary and intended for human activities, including, but not limited to, all habitable spaces, toilets, closets, halls, storage and utility areas, and laundry areas.
is the total combined capacity in actual cubic feet per minute of compressed air at a given pressure from all online compressors.
are all the compressors that are physically connected to compressed air piping and are available to serve peak load. Online compressors do not include back up compressors whose only purpose is to be available when an online compressor fails.
is an open, or direct contact, cooling tower which exposes water directly to the cooling atmosphere, thereby transferring the source heat load from the water directly to the air by a combination of heat and mass transfer.
is designed to be opened or closed.
are controls that are designed to automatically adjust the start time of a space conditioning system each day with the intent of bringing the space to desired occupied temperature levels at the beginning of scheduled occupancy.
are controls that are designed to setup or setback thermostat setpoints before scheduled unoccupied periods based upon the thermal lag and acceptable drift in space temperature that is within comfort limits.
is one of the four principal directional indicators, north, east, south and west, which are marked on a compass. Also called cardinal directions.
is oriented to within 45 degrees of true east, including 45°00'00" south of east (SE), but excluding 45°00'00" north of east (NE).
is oriented to within 45 degrees of true north, including 45°00'00" east of north (NE), but excluding 45°00'00" west of north (NW).
is oriented to within 45 degrees of true south including 45°00'00" west of south (SW), but excluding 45°00'00" east of south (SE).
is oriented to within 45 degrees of true west, including 45°00'00" north of due west (NW), but excluding 45°00'00" south of west (SW).
is air taken from outdoors and not previously circulated in the building. (Outside air)
are areas external to a building. These include but are not limited to the following areas:
is the external area of any operable doorway in or out of a building, including overhead doors. These areas serve any doorway, set of doors (including elevator doors such as in parking garages), turnstile, vestibule or other form of portal that is ordinarily used to gain access to the building by its users and occupants. Where buildings have separate one-way doors to enter and to leave, this also includes any area serving any doors ordinarily used to leave the building.
is the exterior surfaces of a building, not including horizontal roofing, signs and surfaces not visible from any public accessible viewing location.
is a permanent structure, other than a parking garage area, consisting of a roof and supporting building elements, with the area beneath at least partially open to the elements. A canopy may be freestanding or attached to surrounding structures. A canopy roof may serve as the floor of a structure above.
is a covered, open-sided structure designed or used primarily for the purpose of parking vehicles, having a roof over the parking area. Typically, carports are free-standing or projected from the side of the building and are only two or fewer car lengths deep. A “Carport” is not a “Garage.”
is the area of an improvement to a site that is paved or has other structural features such as curbs, plazas, entries, parking lots, site roadways, driveways, walkways, sidewalks, bikeways, water features and pools, storage or service yards, loading docks, amphitheaters, outdoor sales lots, and private monuments and statuary.
is the portion of the perimeter of an outdoor sales area immediately adjacent to a public street, road or sidewalk.
is an uncovered paved area used exclusively for the display of vehicles, equipment or other merchandise for sale. All internal and adjacent access drives, walkway areas, employee and customer parking areas, vehicle service or storage areas are not outdoor sales lot areas, but are considered hardscape.
is an area that is paved with concrete, asphalt, stone, brick, gravel or other improved wearing surface, including the curb.
is anywhere along the adjacent highway, street, road or sidewalk running parallel to an outdoor sales frontage.
are statuary, buildings, structures and/or hardscape on public land.
is a canopy specifically to cover and protect an outdoor sales area.
Stairways are one or more flights of . stairs with the necessary landings and platforms connecting them to form a continuous and uninterrupted passage from one level to another. An exterior stairway is open on at least one side, except for required structural columns, beams, handrails and guards. The adjoining open areas shall be either yards, courts or public ways. The other sides of the exterior stairway need not be open. Ramps are walking surfaces with a slope steeper than 5 percent.
is a gasoline, natural gas, diesel or other fuel dispensing station.
is a geographic area designated by the California Energy Commission in accordance with Part 1, Section 10-114, that determines requirements for outdoor lighting, including lighting power densities and specific control, equipment or performance requirements. Lighting zones are numbered LZ0, LZ1, LZ2, LZ3 and LZ4.
is a contiguous opaque surface, oriented horizontally and projecting outward horizontally from an exterior vertical surface.
means Part 1 of Title 24 of the California Code of Regulations.
means Part 6 of Title 24 of the California Code of Regulations.
occurs when a system or device is operating below its maximum rated capacity.
is the fraction (percentage) of particles that are captured on air filter equipment as determined during rating tests conducted in accordance with ASHRAE Standard 52.2 or AHRI Standard 680. Particle Size Efficiency is measured in three particle size ranges: 0.3-1.0, 1.0-3.0, 3.0-10 microns.
is the American National Standards Institute and National Spa and Pool Institute document entitled “American National Standard for Residential Inground Swimming Pools,” 2003 ( ANSI/NSPI-5 2003).
are features or devices that circulate pool water in addition to that required for pool filtration, including, but not limited to, solar pool heating systems, filter backwashing, pool cleaners, waterfalls, fountains and spas.
is a diverter valve designed to backwash filters located between the circulation pump and the filter, including, but not limited to, slide, push-pull, multiport and full-flow valves.
is a pump capable of operating at two (2) or more speeds and includes two-speed and variable-speed pumps.
is the NSF International (formerly National Sanitation Foundation) Standard and American National Standards Institute document entitled “Circulation System Components and Related Materials for Swimming Pools, Spas/Hot Tubs,” 2005 (NSF/ ANSI 50 – 2005).
are permanently installed residential in-ground swimming pools intended for use by a single-family home for noncommercial purposes and with dimensions as defined in ANSI/NSPI-5.
is the primary air enclosure boundary separating indoor and outdoor air. For example, a volume that has more leakage to the outside than to the conditioned space would be considered outside the pressure boundary. Exposed earth in a crawlspace or basement shall not be considered part of the pressure boundary.
is the airflow (cfm or L/s) supplied to the zone from the air-handling unit at which the outdoor air intake is located. It includes outdoor intake air and recirculated air from that air-handling unit but does not include air transferred or air recirculated to the zone by other means.
is compressed air storage located upstream of the distribution system and any pressure flow regulators.
is a type of boiler with a capacity (rated maximum input) of 300,000 Btus per hour (Btu/h) or more that serves a process.
are processes that are regulated under Part 6, serving computer rooms, data centers, elevators, escalators and moving walkways, laboratories, enclosed parking garages, commercial kitchens, refrigerated warehouses, commercial refrigeration, compressed air systems, and process boilers.
is a load resulting from a process.
is a space that is thermostatically controlled to maintain a process environment temperature less than 55°F or to maintain a process environment temperature greater than 90°F for the whole space that the system serves, or that is a space with a space-conditioning system designed and controlled to be incapable of operating at temperatures above 55°F or incapable of operating at temperatures below 90°F at design conditions.
is the predicted energy use of proposed building derived from application of the building energy use modeling rules described in the Alternative Calculation Method (ACM) Approval Manual.
are spaces generally open to the public at large, customers or congregation members, or similar spaces where occupants need to be prevented from controlling lights for safety, security or business reasons.
R-VALUE is the measure of the thermal resistance of insulation or any material or building component expressed in ft2-hr-°F/Btu.
is a highly reflective, low emitting material installed at the underside surface of the roof deck and the inside surface of gable ends or other exterior vertical surfaces in attics to reduce solar heat gain.
is the cooling of air that has been previously heated by space-conditioning equipment or systems serving the same building.
is energy used in a building that (1) is recovered from space conditioning, service water heating, lighting, or process equipment after the energy has performed its original function; (2) provides space conditioning, service water heating, or lighting; and (3) would otherwise be wasted.
is the support document for the Building Energy Efficiency Standards and the ACM Approval Manuals. The document consists of three sections: the Reference Joint Appendices (JA), the Reference Residential Appendices (RA) and the Reference Nonresidential Appendices (NA).
is a space constructed for storage or handling of products, where mechanical refrigeration is used to maintain the space temperature at 55°F or less.
is a building or a space greater than or equal to 3,000 square feet constructed for storage or handling of products, where mechanical refrigeration is used to maintain the space temperature at 55°F or less.
is the heating of air that has been previously cooled by cooling equipment or supplied by an economizer.
is the reconstruction or renewal for the purpose of maintenance of any component, system or equipment of an existing building. Repairs shall not increase the preexisting energy consumption of the repaired component, system or equipment. Replacement of any component, system or equipment for which there are requirements in the Standards is considered an alteration and not a repair.
is air that is used to replace air removed from a building through an exhaust system. Replacement air may be derived from one or more of the following: makeup air, portions of supply air, transfer air or infiltration air.
is air entering a space from an air-conditioning, heating or ventilating system for the purpose of comfort conditioning. Supply air is generally filtered, fan-forced, and heated, cooled, humidified or dehumidified as necessary to maintain specified temperature and humidity conditions.
is air transferred, whether actively by fans or passively by pressure differentials, from one room to another within a building through openings in the room envelope.
is the manual developed by the Commission, under Section 25402.1 of the Public Resources Code, to aid designers, builders and contractors in meeting energy efficiency standards for low-rise residential buildings.
is one of the following:
is a room or area containing a sink used for personal hygiene, toilet, shower or a tub.
is a nonhabitable room used for the storage of linens, household supplies, clothing, nonperishable food or similar uses, and which is not a hallway or passageway.
is a nonhabitable building or portion of building, attached to or detached from a residential dwelling unit, in which motor vehicles are parked.
is a room or area used for cooking, food storage and preparation and washing dishes, including associated counter tops and cabinets, refrigerator, stove, ovens and floor area.
Laundry is a nonhabitable room or space which contains plumbing and electrical connections for a washing machine or clothes dryer.
is a nonhabitable detached building used for the storage of tools, garden equipment or miscellaneous items.
is the outside cover of a building or structure including the structural supports, decking and top layer that is exposed to the outside with a slope less than 60 degrees from the horizontal.
is a roof that has a ratio of rise to run of 2:12 or less (9.5 degrees from the horizontal).
is a roof that has a ratio of rise to run of greater than 2:12 (9.5 degrees from the horizontal).
is a rigid type board installed directly below a low-sloped roof membrane, with or without above deck thermal insulation, to: (a) improve a roof system’s compressive strength, (b) physically separate the roof membrane from the thermal insulation, or (c) physically separate a new roof covering from an underlying roof membrane as part of a roof overlay project.
is piping that is no more than 12 feet long and that connects to a fixture or an individual terminal unit.
is: (a) for single component and azeotropic refrigerants, the saturation temperature corresponding to the refrigerant pressure at the condenser entrance, or (b) for zeotropic refrigerants, the arithmetic average of the Dew Point and (also known as CONDENSING TEMPERATURE) Bubble Point temperatures corresponding to the refrigerant pressure at the condenser entrance.
is the total cooling output of an (SEER) air conditioner in Btu during its normal usage period for cooling divided by the total electrical energy input in watt-hours during the same period, as determined using the applicable test method in the Appliance Efficiency Regulations.
is heating of water for sanitary purposes for human occupancy, other than for comfort heating.
is the ratio of the solar heat gain through a (SC) fenestration product to the solar heat gain through an unshaded 1/8-inch-thick clear double strength glass under the same set of conditions. For nonresidential, high-rise residential and hotel/motel buildings, this shall exclude the effects of mullions, frames, sashes, and interior and exterior shading devices.
definitions include the following:
is a pixilated image producing electronically controlled (EMC) sign formed by any light source. Bare lamps used to create linear lighting animation sequences through the use of chaser circuits, also known as “chaser lights” are not considered an EMC.
is an internally illuminated sign with multiple components, each built in the shape of an individual three-dimensional letter or symbol that are each independently illuminated, with a separate translucent panel over the light source for each element.
is a sign with two parallel opposing faces.
is a sign for traffic direction, warning and roadway identification.
is a building that is of Occupancy Group R-3.
is a type of air-cooled small or large commercial package air-conditioning and (SPVAC) heating equipment; factory assembled as a single package having its major components arranged vertically, which is an encased combination of cooling and optional heating components; is intended for exterior mounting on, adjacent interior to, or through an outside wall; and is powered by single or three-phase current. It may contain separate indoor grille, outdoor louvers, various ventilation options, indoor free air discharge, ductwork, wall plenum or sleeve. Heating components may include electrical resistance, steam, hot water, gas, or no heat but may not include reverse cycle refrigeration as a heating means.
is an SPVAC that utilizes reverse cycle refrigeration as its primary heat (SPVHP) source, with secondary supplemental heating by means of electrical resistance, steam, hot water or gas.
is an air distribution system that supplies air to one thermal zone.
is thermal, chemical or electrical energy derived from direct conversion of incident solar radiation at the building site.
is the area of the rough opening for the skylight.
is one of the following three types of skylights: glass mounted on a curb, glass not mounted on a curb, or plastic (assumed to be mounted on a curb).
is the Sheet Metal and Air-conditioning Contractors National Association.
is the Sheet Metal Contractors’ National Association document “HVAC Duct Construction Standards Metal and Flexible - 3rd Edition,” 2006 (2006 ANSI/SMACNA-006-2006 HVAC Duct Construction Standards Metal and Flexible 3rd Edition).
is the Sheet Metal Contractors’ National Association document entitled “Residential Comfort System Installation Standards Manual, Seventh Edition,” (1998).
is a space where public assistance and social services are provided to individuals or families.
is a measure of the (SRI) roof’s ability to reject solar heat which includes both reflectance and emittance.
is the fraction of domestic hot water demand provided by a solar water-heating system. (SSF)
is a section of the roof designated and reserved for the future installation of a solar electric or solar thermal system.
SPA is a vessel that contains heated water in which humans can immerse themselves, is not a pool, and is not a bathtub.
is a system that provides heating or cooling within or associated with conditioned spaces in a building, and may incorporate use of components such as chillers/compressors, fluid distribution systems (e.g., air ducts, water piping, refrigerant piping), pumps, air handlers, cooling and heating coils, air or water cooled condensers, economizers, terminal units, and associated controls.
is a building that complies with the mandatory and prescriptive requirements in the Title 24 Building Energy Efficiency Standards by using the building energy modeling rules described in the Alternative Calculation Method (ACM) Reference Manual.
is a storage area within a refrigerated warehouse where space temperatures are maintained at or above 32°F.
is a storage area within a refrigerated warehouse where the space temperatures are maintained below 32°F.
is a portion of a building occupied by a tenant.
is solid or liquid material used to store heat for later heating use or for reducing cooling requirements.
is a measurement of the resistance over time of a material or building component to the passage of heat in (hr × ft2 × °F)/Btu. (R)
is a refrigerant metering valve, installed in an (TXV) air conditioner or heat pump, which controls the flow of liquid refrigerant entering the evaporator in response to the superheat of the gas leaving it.
TIME DEPENDENT VALUATION (TDV) ENERGY is the time varying energy caused to be used by the building to provide space conditioning and water heating and for specified buildings lighting. TDV energy accounts for the energy used at the building site and consumed in producing and in delivering energy to a site, including, but not limited to, power generation, transmission and distribution losses.
is the heat rejected by refrigeration system compressors at (THR) design conditions, consisting of the design cooling capacity plus the heat of compression added by the compressors.
is a compressor that is designated for part-load operation, handling the short-term variable trim load of end uses, in addition to the fully loaded base compressors.
UL is the Underwriters Laboratories.
is the Underwriters Laboratories document entitled “Standard for Oil-Fired Central Furnaces,” 2006.
is the Underwriters Laboratories document entitled “Standard for Oil-Fired Unit Heaters,” 2006 with revisions 1 through 7.
is the Underwriters Laboratories document entitled “ Track Lighting Systems,” 2000.
is the Underwriters Laboratories document entitled “ Luminaires,” 2008.
is enclosed space within a building that is not directly conditioned or indirectly conditioned.
is the regulation issued by Department of Energy and available in the Code of Federal Regulation - Title 10, Chapter II, Subchapter D, Part 430 – Energy Conservation Program for Consumer Products. Relevant testing methodologies are specified in “Appendix N to subpart B of Part 430 – Uniform test method for measuring the energy consumption of furnaces and boilers.”
is the regulation issued by Department of Energy and available in the Code of Federal Regulation - Title 10, Chapter II, Subchapter D, Part 431 - Energy Conservation Program for Certain Commercial and Industrial equipment. Relevant testing methodologies are specified in “Subpart E to Part 431 – Uniform test method for the measurement of energy efficiency of commercial packaged boilers.”
is a machine for vending and dispensing refrigerated or nonrefrigerated food and beverages or general merchandise.
are rare or precious objects, including, but not limited to, jewelry, coins, small art objects, crystal, ceramics or silver, the selling of which involves customer inspection of very fine detail from outside of a locked case.
The water balance of a cooling tower is: .
M = makeup water (from the mains water supply)
E = losses due to evaporation
B = losses due to blowdown
is an enclosed wood-burning appliance used for space heating and/or domestic water heating.
(See “ wood heater.”)
is a zone serving a process where reset of the zone temperature setpoint during a demand shed event might disrupt the process, including but not limited to computer rooms, data centers, telecom and private branch exchange (PBX) rooms, and laboratories.
is a zone that is not a critical zone.
is a space or group of spaces within a building with sufficiently similar comfort conditioning requirements so that comfort conditions, as specified in Section 140.4(b)3 or 150.0(h), as applicable, can be maintained throughout the zone by a single controlling device.