CODES

ADOPTS WITH AMENDMENTS:

International Energy Conservation Code 2015 (IECC 2015)

Chapter 1 [CE] Scope and Administration

Chapter 2 [CE] Definitions

Chapter 3 [CE] General Requirements

Chapter 4 [CE] Commercial Energy Efficiency

Chapter 5 [CE] Existing Buildings

Chapter 6 [CE] Referenced Standards

Chapter 1 [RE] Scope and Administration

Chapter 2 [RE] Definitions

Chapter 3 [RE] General Requirements

Chapter 4 [RE] Residential Energy Efficiency

Chapter 5 [RE] Existing Buildings

Chapter 6 [RE] Referenced Standards

The provisions of this chapter shall control the alteration, repair, addition and change of occupancy of existing buildings and structures.
Except as specified in this chapter, this code shall not be used to require the removal, alteration or abandonment of, nor prevent the continued use and maintenance of, an existing building or building system lawfully in existence at the time of adoption of this code.

C501.3 Maintenance

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Buildings and structures, and parts thereof, shall be maintained in a safe and sanitary condition. Devices and systems thatwhich are required by this code shall be maintained in conformance towith the code edition under which installed. The owner or the owner's authorized agent shall be responsible for the maintenance of buildings and structures. The requirements of this chapter shall not provide the basis for removal or abrogation of energy conservation, fire protection and safety systems and devices in existing structures.

C501.4 Compliance

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Alterations, repairs, additions and changes of occupancy to, or relocation of, existing buildings and structures shall comply with the provisions for alterations, repairs, additions and changes of occupancy or relocation, respectively, in the International Building Code, International Fire Code, International Fuel Gas Code, International Mechanical Code, InternationalUniform Plumbing Code, International Property Maintenance Code, International Private Sewage Disposal Code and NFPA 70.

C501.5 New and Replacement Materials

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Except as otherwise required or permitted by this code, materials permitted by the applicable code for new construction shall be used. Like materials shall be permitted for repairs, provided no hazards to life, health or property are notis created. Hazardous materials shall not be used where the code for new construction would not permit use of these materialstheir use in buildings of similar occupancy, purpose and location.

C501.6 Historic Buildings

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
No provisions of this code relating to the construction, repair, alteration, restoration and movement of structures, and change of occupancy shall be mandatory for historic buildings provided a report has been submitted to the code official and signed by a registered design professional, or a representative of the State Historic Preservation Office or the historic preservation authority having jurisdiction, demonstrating that compliance with that provision would threaten, degrade or destroy the historic form, fabric or function of the building.The building official may modify the specific requirements of this code for historic buildings and require alternate provisions which will result in a reasonable degree of energy efficiency. This modification may be allowed for those buildings or structures that are listed in the state or national register of historic places; designated as a historic property under local or state designation law or survey; certified as a contributing resource with a national register listed or locally designated historic district; or with an opinion or certification that the property is eligible to be listed on the national or state registers of historic places either individually or as a contributing building to a historic district by the state historic preservation officer or the keeper of the national register of historic places.

C502.1 General

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Additions to an existing building, building system or portion thereof shall conform to the provisions of this code as those provisionsthey relate to new construction without requiring the unaltered portion of the existing building or building system to comply with this code. Additions shall not create an unsafe or hazardous condition or overload existing building systems. An addition shall be deemed to comply with this code if the addition alone complies or if the existing building and addition comply with this code as a single building. Additions shall comply with Section C502.2.

Additions complying with ANSI/ASHRAE/IESNA 90.1. need not comply with Sections C402, C403, C404 and C405.
Additions shall comply with Sections C502.2.1 through C502.2.6.2.

C502.2.1 Vertical Fenestration

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
NewAdditions with vertical fenestration area that results in a total building vertical fenestration area less than or equal to that specified in Section C402.4.1 shall comply with Section C402.4. Additions with vertical fenestration that results in a total building vertical fenestration area greater than that specified in Section C402.4.1 or additions that exceed the fenestration area greater than Section C402.4.1 shall comply with Section C402.4.1.1 for the addition only. Additions that result in a total building vertical glass area exceeding that specified in Section C402.4.1.1 shall comply with Section C407shall comply with one of the following:

  1. Vertical fenestration alternate per Section C402.4.1.1 or C402.4.1.3 for the addition only.
  2. Component performance option with target area adjustment per Section C402.1.5 or the total building performance option in Section C407 for the whole building.

C502.2.2 Skylight Area

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
NewAdditions with skylights area that results in a total building fenestrationskylight area less than or equal to that specified in Section C402.4.1 shall comply with Section C402.4. Additions with skylights area that result in a total building skylight area greater than that specified in Section C402.4.1 or additions that exceed the skylight area shall comply with Section C402.4.1.2 for the addition only. Additions that result in a total building skylight area exceeding that specified in Section C402.4.1.2 shall comply with Section C407 shall comply with the component performance option with the target area adjustment per Section C402.1.5 or the total building performance option in Section C407 for the whole building.

C502.2.3 Building Mechanical Systems

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
New mechanical systems and equipment that are part of the addition and serveserving the building heating, cooling andor ventilation needs, that are part of the addition, shall comply with Section C403.
New service water-heating equipment, controls and service water heating piping shall comply with Section C404.

C502.2.5 Pools and Inground Permanently Installed Permanent Spas

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
New pools and inground permanently installed spas shall comply with Section C404.9 C404.11.

C502.2.6 Lighting and Power and Systems

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
New lighting systems that are installed as part of the addition shall comply with Section C405.
The total interior lighting power for the addition shall comply with Section C405.4.2 for the addition alone, or the existing building and the addition shall comply as a single building.
The total exterior lighting power for the addition shall comply with Section C405.5.1 for the addition alone, or the existing building and the addition shall comply as a single building.

C502.2.7 Refrigeration systems

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
New refrigerated spaces and refrigeration equipment shall comply with Section C410.

C503.1 General

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Alterations to any building or structure shall comply with the requirements of the code for new construction. Alterations shall be such that the existing building or structure is no less conforming towith the provisions of this code than the existing building or structure was prior to the alteration. Alterations to an existing building, building system or portion thereof shall conform to the provisions of this code as those provisions they relate to new construction without requiring the unaltered portions of the existing building or building system to comply with this code. Alterations shall not create an unsafe or hazardous condition or overload existing building systems.

Alterations complying with ANSI/ASHRAE/IESNA 90.1. need not comply with Sections C402, C403, C404 and C405.

Exception: The following alterations need not comply with the requirements for new construction, provided the energy use of the building is not increased:

1. Storm windows installed over existing fenestration.

2. Surface- applied window film installed on existing single- pane fenestration assemblies reducingto reduce solar heat gain, provided the code does not require the glazing or fenestration to be replaced.

3. Existing ceiling, wall or floor cavities exposed during construction, provided that these cavities are filled with insulationinsulated to full depth with insulation having a minimum nominal value of R-3.0 per inch installed per Section C402.

4. Construction where the existing roof, wall or floor cavity is not exposed.

5. Roof recover.

6. Air barriers shall not be required for roof recover and roof replacement where the alterations or renovations to the building do not include alterations, renovations or repairs to the remainder of the building envelope.

7. Alterations that replace less than 50 percent of the luminaires in a space, provided that such Alterations do not increase the installed interior lighting power Replacement of existing doors that separate conditioned space from the exterior shall not require the installation of a vestibule or revolving door, provided however that an existing vestibule that separates a conditioned space from the exterior shall not be removed.

C503.2 Change in Space Conditioning

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Any nonconditioned or low-energy space that is altered to become conditioned space or semi-heated space shall be required to be brought into full compliance with this code. Any semi-heated space that is altered to become conditioned space shall be required to be brought into full compliance with this code.

Exception: Where the component performance building envelope option in Section C402.1.5 is used to comply with this Section, the Proposed UA is allowed to be up to 110 percent of the Target UA. Where the total building performance option in Section C407 is used to comply with this section, the annual energy consumption of the proposed design is allowed to be 110 percent of the annual energy consumption otherwise allowed by Section C407.3.

C503.3 Building Envelope

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
New building envelope assemblies that are part of the alteration shall comply with Sections C402.1 through C402.5 as applicable.

Exception: Air leakage testing is not required for alterations and repairs, unless the project includes a change in space conditioning according to Section C503.2 or a change of occupancy or use according to Section C505.1.
Roof replacements shall comply with Table C402.1.3 or C402.1.4 where the existing roof assembly is part of the building thermal envelope and contains insulation entirely above the roof deck.

C503.3.2 Vertical Fenestration

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The addition of vertical fenestration that results in a total building vertical fenestration area less than or equal to that specified in Section C402.4.1 shall comply with Section C402.4. The addition of vertical fenestration that results in a total building fenestration area greater than Section C402.4.1 shall comply with Section C402.4.1.1 for the space adjacent to the new fenestration only. Alterations that result in a total building vertical glass area exceeding that specified in Section C402.4.1.1 shall comply with Section C407. fenestration area greater than specified in Section C402.4.1 shall comply with one of the following:
  1. Vertical fenestration alternate per Section C402.1.3 for the new vertical fenestration added.
  2. Vertical fenestration alternate per Section C402.4.1.1 for the area adjacent to the new vertical fenestration added.
  3. Component performance option with target area adjustment per Section C402.1.5 or the total building performance option in Section C407 for the whole building.

C503.3.2.1 Application to replacement fenestration products

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Where some or all of an existing fenestration unit is replaced with a new fenestration product, including sash and glazing, the replacement fenestration unit shall meet the applicable requirements for U-factor and SHGC in Table C402.4.

Exception: An area-weighted average of the U-factor of replacement fenestration products being installed in the building for each fenestration product category listed in Table C402.4 shall be permitted to satisfy the U-factor requirements for each fenestration product category listed in Table C402.4. Individual fenestration products from different product categories listed in Table C402.4 shall not be combined in calculating the area-weighted average U-factor.

C503.3.3 Skylight Area

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The addition of skylights area that results in a total building skylight area less than or equal to that specified in Section C402.4.1 shall comply with Section C402.4. The addition of skylight areaAlterations that results in a total building skylight area greater than that specified in Section C402.4.1 shall comply with Section C402.4.1.2 for the space adjacent to the new skylights. Alterations that result in a total building skylight area exceeding that specified in Section C402.4.1.2 shall comply with Section C407 the component performance option with target area adjustment per Section C402.1.5 or the total building performance option in Section C407 for the whole building.

C503.4 Heating and Cooling Systems

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
New heating, cooling and duct systems that are part of the alteration shall comply with Sections C403.

C503.4 Mechanical systems

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Those parts of systems which are altered or replaced shall comply with Section C403. Additions or alterations shall not be made to an existing mechanical system that will cause the existing mechanical system to become out of compliance.

Exception: Existing mechanical systems which are altered or where parts of the system are replaced are not required to be modified to comply with Section C403.6 as long as mechanical cooling is not added to the system.

All new systems in existing buildings, including packaged unitary equipment and packaged split systems, shall comply with Section C403.

Where mechanical cooling is added to a space that was not previously cooled, the mechanical system shall comply with either Section C403.6 or C403.3.

Exceptions:
  1. Alternate designs that are not in full compliance with this code may be approved when the code official determines that existing building constraints including, but not limited to, available mechanical space, limitations of the existing structure, or proximity to adjacent air intakes/exhausts make full compliance impractical. Alternate designs shall provide alternate energy savings strategies including, but not limited to, Demand Control Ventilation or increased mechanical cooling or heating efficiency above that required by Tables C403.2.3(1) through C403.2.3(10).
  2. Qualifying small equipment: This exception shall not be used for unitary cooling equipment installed outdoors or in a mechanical room adjacent to the outdoors. This exception is allowed to be used for other cooling units and split systems serving one zone with a total cooling capacity rated in accordance with Section C403.2.3 of less than 33,000 Btu/h (hereafter referred to as qualifying small systems) provided that these are high-efficiency cooling equipment with SEER and EER values more than 15 percent higher than minimum efficiencies listed in Tables C403.2.3 (1) through (3), in the appropriate size category, using the same test procedures. Equipment shall be listed in the appropriate certification program to qualify for this exception. The total capacity of all qualifying small equipment without economizers shall not exceed 72,000 Btu/h per building, or 5 percent of its air economizer capacity, whichever is greater. That portion of the equipment serving Group R occupancies is not included in determining the total capacity of all units without economizers in a building. Redundant units are not counted in the capacity limitations. This exception shall not be used for the shell-and-core permit or for the initial tenant improvement or for Total Building Performance.
  3. Chilled water terminal units connected to systems with chilled water generation equipment with IPLV values more than 25 percent higher than minimum part load efficiencies listed in Table C403.2.3(7), in the appropriate size category, using the same test procedures. Equipment shall be listed in the appropriate certification program to qualify for this exception. The total capacity of all systems without economizers shall not exceed 480,000 Btu/h per building, or 20 percent of its air economizer capacity, whichever is greater. That portion of the equipment serving Group R occupancy is not included in determining the total capacity of all units without economizers in a building. This exception shall not be used for the initial permit (this includes any initial permit for the space including, but not limited to, the shell-and-core permit, built-to-suit permit, and tenant improvement permit) or for Total Building Performance Method.

Alterations to existing mechanical cooling systems shall not decrease economizer capacity unless the system complies with either Section C403.2.6 or C403.3. In addition, for existing mechanical cooling systems that do not comply with either Section C403.2.6 or C403.3, including both the individual unit size limits and the total building capacity limits on units without economizer; other alterations shall comply with Table C503.4.

When space cooling equipment is replaced, controls shall comply with all requirements under Section C403.6 and related subsections or provide for integrated operation with economizer in accordance with Section C403.3.1.

Existing equipment currently in use may be relocated within the same floor or same tenant space if removed and reinstalled within the same permit.

TABLE C503.4
ECONOMIZER COMPLIANCE OPTIONS FOR MECHANICAL ALTERATIONS


Unit Type Option A Option B
(alternate to A)
Option C
(alternate to A)
Option D
(alternate to A)
Any alteration with
new or
replacement
equipment
Replacement unit of
the same type
with the same or
smaller output
capacity
Replacement unit of
the same type with a larger output
capacity
New equipment added to existing system or replacement unit of a different type
1. Packaged Units Efficiency: min.1
Economizer: C403.4.12
Efficiency: min.1
Economizer: C403.4.12,3
Efficiency: min.1
Economizer: C403.4.12,3

Efficiency: min.1
Economizer: C403.4.12,4

2. Split Systems Efficiency: min.1 Economizer: C403.4.12 Efficiency: + 10/5%5
Economizer: shall not decrease existing economizer capability

Only for new units
< 54,000 Btuh replacing unit installed prior to 1991 (one of two):
Efficiency: + 10/5%5 Economizer: 50%6
Efficiency: min1
Economizer: C403.4.12,4
For units > 54,000 Btuh or any units installed after 1991:
Option A
3. Water Source Heat Pump Efficiency: min.1 Economizer: C403.4.12 (two of three):
Efficiency: + 10/5%5
Flow control valve7
Economizer: 50%6
(three of three):
Efficiency: + 10/5%5
Flow control valve7
Economizer: 50%6 (except for certain pre-1991 systems8)
Efficiency: min.1 Economizer: C403.4.12,4 (except for certain pre-1991 systems8)
4. Hydronic
Economizer using
Air-Cooled Heat
Rejection
Equipment (Dry
Cooler)
Efficiency: min.1
Economizer: 14332
Efficiency: + 10/5%5
Economizer: shall not decrease existing economizer capacity
Option A Efficiency: min.1
Economizer: C403.4.12,4
5. Air-Handling Unit (including fan coil units) where the system has an air-cooled chiller Efficiency: min.1 Economizer: C403.4.12
Economizer: shall not decrease existing economizer capacity
Option A
(except for certain pre-1991 systems8)
Option A
(except for certain pre-1991 systems8)
6. Air- Handling Unit (including fan coil units) and Water-cooled Process Equipment, where the system has a water-cooled chiller10 Efficiency: min.1 Economizer: C403.4.12
Economizer: shall not decrease existing economizer capacity
Option A (except for certain pre-1991 systems8 and certain 1991-2004 systems9.)
Efficiency: min.1
Economizer: C403.4.12,4 (except for certain pre-1991 systems8 and certain 1991-2004 systems9)
7. Cooling Tower Efficiency: min.1 Economizer: C403.4.12 No requirements Option A Option A
8. Air-Cooled Chiller Efficiency: min.1 Economizer: C403.4.12
Efficiency: + 5%11 Economizer: shall not decrease existing economizer capacity
Efficiency (two of two): (1) + 10%12 and
(2) multistage
Economizer: shall not decrease existing economizer capacity
Efficiency: min.1
Economizer: C403.4.12,4
9. Water-Cooled Chiller Efficiency: min.1
Economizer: C403.4.12
Efficiency (one of two):
(1) + 10%13 or
(2) plate frame heat exchanger15
Economizer: shall not decrease existing economizer capacity
Efficiency (two of two):
(1) + 15%14 and
(2) plate-frame heat exchanger15
Economizer: shall not decrease existing economizer capacity
Efficiency: min.1 Economizer: C403.4.12,4
10. Boiler Efficiency: min.1
Economizer: C403.4.12
Efficiency: + 8%16
Economizer: shall not decrease existing economizer capacity
Efficiency: + 8%16
Economizer: shall not decrease existing economizer capacity
Efficiency: min.1
Economizer: C403.4.12,4

  1. Minimum equipment efficiency shall comply with Section C403.2.3 and Tables C403.2.3(1) through C403.2.3(9).
  2. System and building shall comply with Section C403.4.1 (including both the individual unit size limits and the total building capacity limits on units without economizer). It is acceptable to comply using one of the exceptions to Section C403.4.1.
  3. All equipment replaced in an existing building shall have air economizer complying with Sections C403.3.1 and C403.4.1 unless both the individual unit size and the total capacity of units without air economizer in the building is less than that allowed in Exception 1 to Section C403.3.1.
  4. All separate new equipment added to an existing building shall have air economizer complying with Sections C403.3.1 and C403.4.1 unless both the individual unit size and the total capacity of units without air economizer in the building is less than that allowed in Exception 1 to Section C403.4.1.
  5. Equipment shall have a capacity-weighted average cooling system efficiency:

    1. for units with a cooling capacity below 54,000 Btuh, a minimum of 10% greater than the requirements in Tables C403.2.3(1) and C403.2.3(2)(1.10 x values in Tables C403.2.3(1) and C403.2.3(2)).
    2. for units with a cooling capacity of 54,000 Btuh and greater, a minimum of 5% greater than the requirements in Tables C403.2.3(1) and C403.2.3(2) (1.05 x values in Tables C403.2.3(1) and C403.2.3(2)).
  6. Minimum of 50% air economizer that is ducted in a fully enclosed path directly to every heat pump unit in each zone, except that ducts may terminate within 12 inches of the intake to an HVAC unit provided that they are physically fastened so that the outside air duct is directed into the unit intake. If this is an increase in the amount of outside air supplied to this unit, the outside air supply system shall be capable of providing this additional outside air and equipped with economizer control.
  7. Have flow control valve to eliminate flow through the heat pumps that are not in operation with variable speed pumping control complying with Section C403.4.3 for that heat pump. – When the total capacity of all units with flow control valves exceeds 15% of the total system capacity, a variable frequency drive shall be installed on the main loop pump. – As an alternate to this requirement, have a capacity-weighted average cooling system efficiency that is 5% greater than the requirements in note 5 (i.e. a minimum of 15%/10% greater than the requirements in Tables C403.2.3(1) and C403.2.3(2) (1.15/1.10 x values in Tables C403.2.3(1) and C403.2.3(2)).
  8. Systems installed prior to 1991 without fully utilized capacity are allowed to comply with Option B, provided that the individual unit cooling capacity does not exceed 90,000 Btuh.
  9. Economizer not required for systems installed with water economizer plate and frame heat exchanger complying with previous codes between 1991 and June 2013, provided that the total fan coil load does not exceed the existing or added capacity of the heat exchangers.
  10. For water-cooled process equipment where the manufacturers specifications require colder temperatures than available with waterside economizer, that portion of the load is exempt from the economizer requirements.
  11. The air-cooled chiller shall have an IPLV efficiency that is a minimum of 5% greater than the IPLV requirements in Table C403.2.3(7)(1.05 x IPLV values in Table C403.2.3(7)).
  12. The air-cooled chiller shall:

    1. have an IPLV efficiency that is a minimum of 10% greater than the IPLV requirements in Table C403.2.3(7) (1.10 x IPLV values in Table C403.2.3(7)), and
    2. be multistage with a minimum of two compressors.
  13. The water-cooled chiller shall have an IPLV efficiency that is a minimum of 10% greater than the IPLV requirements in Table C403.2.3(7) (1.10 x IPLV values in Table C403.2.3(7)).
  14. The water-cooled chiller shall have an IPLV efficiency that is a minimum of 15% greater than the IPLV requirements in Table C403.2.3(7), (1.15 x IPLV values in Table C403.2.3(7)).
  15. Economizer cooling shall be provided by adding a plate-frame heat exchanger on the waterside with a capacity that is a minimum of 20% of the chiller capacity at standard AHRI rating conditions.
  16. The replacement boiler shall have an efficiency that is a minimum of 8% higher than the value in Table C403.2.3(5) (1.08 x value in Table C403.2.3(5)), except for electric boilers.

C503.4.1 Economizers

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
New cooling systems that are part of alteration shall comply with Section C403.3.
New service hot water systems that are part of the alteration shall comply with Section C404.

C503.6 Lighting Systems

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
New lighting systems that are part of the alteration shall comply with Section C405.

Exception.Alterations that replace less than 10 percent of the luminaires in a space, provided that such alterations do not increase the installed interior lighting power.

C503.6 Lighting and motors

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Alterations that replace 50 percent or more of the luminaires in a space enclosed by walls or ceiling-height partitions, replace 50 percent or more of parking garage luminaires, or replace 50 percent or more of the total installed wattage of exterior luminaires shall comply with Sections C405.4 and C405.5. Where less than 50 percent of the fixtures in an interior space enclosed by walls or ceiling-height partitions or parking garage are new, or less than 50 percent of the installed exterior wattage is altered, the installed lighting wattage shall be maintained or reduced.

Where new wiring is being installed to serve added fixtures and/or fixtures are being relocated to a new circuit, controls shall comply with Sections C405.2.1, C405.2.3, C405.2.4, C405.2.5, C405.2.7, C405.3, and as applicable C408.3. In addition, office areas less than 300 ft2 enclosed by walls or ceiling-height partitions, and all meeting and conference rooms, and all school classrooms, shall be equipped with occupancy sensors that comply with Section C405.2.1 and C408.3. Where a new lighting panel (or a moved lighting panel) with all new raceway and conductor wiring from the panel to the fixtures is being installed, controls shall also comply with the other requirements in Sections C405.2 and C408.3.

Where new walls or ceiling-height partitions are added to an existing space and create a new enclosed space, but the lighting fixtures are not being changed, other than being relocated, the new enclosed space shall have controls that comply with Sections C405.2.1, C 405.2.2, C405.2.3, C405.2.4, C405.2.5 and C408.3.

Those motors which are altered or replaced shall comply with Section C405.8.

C503.7 Refrigeration systems

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Those parts of systems which are altered or replaced shall comply with Section C410. Additions or alterations shall not be made to an existing refrigerated space or system that will cause the existing mechanical system to become out of compliance. All new refrigerated spaces or systems in existing buildings, including refrigerated display cases, shall comply with Section C410.

C504.1 General

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Buildings and structures, and parts thereof, shall be repaired in compliance with Section C501.3 and this section. Work on nondamaged components that is necessary for the required repair of damaged components shall be considered part of the repair and shall not be subject to the requirements for alterations in this chapter. Routine maintenance required by Section C501.3, ordinary repairs exempt from permit, and abatement of wear due to normal service conditions shall not be subject to the requirements for repairs in this section.

Where a building was constructed to comply with ANSI/ASHRAE/IESNA 90.1, repairs shall comply with the standard and need not comply with Sections C402, C403, C404 and C405.

C504.2 Application

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
For the purposes of this code, the following shall be considered repairs:.

1. Glass- only replacements in an existing sash and frame.

2. Roof repairs.

3. Air barriers shall not be required for roof repair where the repairs to the building do not include alterations, renovations or repairs to the remainder of the building envelope.

4. Replacement of existing doors that separate conditioned space from the exterior shall not require the installation of a vestibule or revolving door, provided however that an existing vestibule that separates a conditioned space from the exterior shall not be removed.

5. Repairs where only the bulb, the and/or ballast or both within the existing luminaires in a space are replaced, provided that the replacement does not increase the installed interior lighting power.

C505.1 General

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Spaces undergoing a change in occupancy that would result in an increase in demand for either fossil fuel or electrical energy shall comply with this code. Where the use in a space changes from one use in Table C405.4.2(1) or C405.4.2(2) to another use in Table C405.4.2(1) or C405.4.2(2), the installed lighting wattage shall comply with Section C405.4. Spaces undergoing a change in occupancy shall be brought up to full compliance with this code in the following cases:
  1. Any space that is converted from an F, S or U occupancy to an occupancy other than F, S or U.
  2. Any space that is converted to a Group R dwelling unit or portion thereof, from another use or occupancy.
  3. Any Group R dwelling unit or portion thereof permitted prior to July 1, 2002, that is converted to a commercial use or occupancy.
Where the use in a space changes from one use in Table C405.4.2 (1) or (2) to another use in Table C405.4.2 (1) or (2), the installed lighting wattage shall comply with Section C405.4.

Exception: Where the component performance alternative in Section C402.1.5 is used to comply with this section, the proposed UA is allowed to be up to 110 percent of the target UA. Where the total building performance option in Section C407 is used to comply with this section, the annual energy consumption of the proposed design is allowed to be 110 percent of the annual energy consumption otherwise allowed by Section C407.3.
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