CODES

ADOPTS WITH AMENDMENTS:

International Residential Code 2015 (IRC 2015)

Part I ‒ Administrative

Chapter 1 Scope and Administration

Part II ‒ Definitions

Chapter 2 Definitions

Part III ‒ Building Planning and Construction

Chapter 3 Building Planning

Chapter 4 Foundations

Chapter 5 Floors

Chapter 6 Wall Construction

Chapter 7 Wall Covering

Chapter 8 Roof-Ceiling Construction

Chapter 9 Roof Assemblies

Chapter 10 Chimneys and Fireplaces

Part IV ‒ Energy Conservation

Chapter 11 [RE] Energy Efficiency

Part V ‒ Mechanical

Chapter 12 Mechanical Administration

Chapter 13 General Mechanical System Requirements

Chapter 14 Heating and Cooling Equipment and Appliances

Chapter 15 Exhaust Systems

Chapter 16 Duct Systems

Chapter 17 Combustion Air

Chapter 18 Chimneys and Vents

Chapter 19 Special Appliances, Equipment and Systems

Chapter 20 Boilers and Water Heaters

Chapter 21 Hydronic Piping

Chapter 22 Special Fuel oil Piping and Storage Systems

Chapter 23 Solar Thermal Energy Systems

Part VI ‒ Fuel Gas

Chapter 24 Fuel Gas

Part VII ‒ Plumbing

Chapter 25 Plumbing Administration

Chapter 26 General Plumbing Requirements

Chapter 27 Plumbing Fixtures

Chapter 28 Water Heaters

Chapter 29 Water Supply and Distribution

Chapter 30 Sanitary Drainage

Chapter 31 Vents

Chapter 32 Traps

Chapter 33 Storm Drainage

Part VIII ‒ Electrical

Chapter 34 General Requirements

Chapter 34 GENERAL REQUIREMENTS

Chapter 35 Electrical Definitions

Chapter 35 ELECTRICAL DEFINITIONS

Chapter 36 Services

Chapter 36 SERVICES

Chapter 37 Branch Circuit and Feeder Requirements

Chapter 37 BRANCH CIRCUIT AND FEEDER REQUIREMENTS

Chapter 38 Wiring Methods

Chapter 38 WIRING METHODS

Chapter 39 Power and Lighting Distribution

Chapter 39 POWER AND LIGHTING DISTRIBUTION

Chapter 40 Devices and Luminaires

Chapter 40 DEVICES AND LUMINAIRES

Chapter 41 Appliance Installation

Chapter 41 APPLIANCE INSTALLATION

Chapter 42 Swimming Pools

Chapter 42 SWIMMING POOLS

Chapter 43 Class 2 Remote-Control, Signaling and Power-Limited Circuits

Chapter 43 CLASS 2 REMOTE-CONTROL, SIGNALING AND POWER-LIMITED CIRCUITS

Part IX ‒ Referenced Standards

Chapter 44 Referenced Standards

Chapter 45 HIGH WIND ZONES

Chapter 46 COASTAL AND FLOOD PLAIN CONSTRUCTION STANDARDS

Appendix A Sizing and Capacities of Gas Piping

Appendix B Sizing of Venting Systems Serving Appliances Equipped With Draft Hoods, Category I Appliances, and Appliances Listed for Use With Type B Vents

Appendix C Exit Terminals of Mechanical Draft and Direct-Vent Venting Systems

Appendix D Recommended Procedure for Safety Inspection of an Existing Appliance Installation

Appendix E Manufactured Housing Used as Dwellings

Appendix E (E-1 THROUGH E-4)
RESIDENTIAL REQUIREMENTS FOR ENERGY CONSERVATION

Appendix F Radon Control Methods

Appendix G Piping Standards for Various Applications

Appendix H Patio Covers

Appendix I Private Sewage Disposal

Appendix J Existing Buildings and Structures

Appendix J EXISTING BUILDINGS AND STRUCTURES

Appendix K Sound Transmission

Appendix L Permit Fees

Appendix M HOME DAY CARE—R-3 OCCUPANCY

Appendix M WOOD DECKS

Appendix N Venting Methods

Appendix O Automatic Vehicular Gates

Appendix O FOAM PLASTIC DIAGRAMS

Appendix P Sizing of Water Piping System

Appendix Q Reserved

Appendix Q DISCONTINUOUS FOOTINGS

Appendix R Light Straw-Clay Construction

Appendix S Strawbale Construction

Appendix T Recommended Procedure for Worst-Case Testing of Atmospheric Venting Systems Under N1102.4 or N1105 Conditions ≤ 5ACH50

Appendix U SOLAR-READY PROVISIONS—DETACHED ONE- AND TWO-FAMILY DWELLINGS, MULTIPLE SINGLE- FAMILY DWELLINGS (TOWNHOUSES)

Appendix V SWIMMING POOLS, SPAS AND HOT TUBS

Appendix W BASIC LOAD ESTIMATING

Chapter 14 Heating and Cooling Equipment and Appliances

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
User note: Code change proposals to this chapter will be considered by the IRC ‒ Plumbing and Mechanical Code Development Committee during the 2015 (Group A) Code Development Cycle. The text of this chapter is extracted from the 2018 edition of the North Carolina Mechanical Code and has been modified where necessary to conform to the scope of application of the North Carolina Residential Code for One- and Two-Family Dwellings. The section numbers appearing in parentheses after each section number are the section numbers of the corresponding text in the North Carolina Mechanical i.e., (312.1) and Residential i.e., (R1004.1) Codes.
Heating and cooling equipment and appliances shall be installed in accordance with the manufacturer's instructions and the requirements of this code.
Heating and cooling equipment and appliances shall be located with respect to building construction and other equipment and appliances to permit maintenance, servicing and replacement. Clearances shall be maintained to permit cleaning of heating and cooling surfaces; replacement of filters, blowers, motors, controls and vent connections; lubrication of moving parts; and adjustments.

Exception: Access shall not be required for ducts, piping, or other components approved for concealment.

M1401.3 (312.1) Equipment and Appliance Sizing

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Heating and cooling equipment and appliances shall be sized in accordance with ACCA Manual S or other approved sizing methodologies based on building loads calculated in accordance with ACCA Manual J or other approved heating and cooling calculation methodologies.

Exception: Heating and cooling equipment and appliance sizing shall not be limited to the capacities determined in accordance with Manual S where either of the following conditions applies:
  1. The specified equipment or appliance utilizes multistage technology or variable refrigerant flow technology and the loads calculated in accordance with the approved heating and cooling calculation methodology are within the range of the manufacturer's published capacities for that equipment or appliance.
  2. The specified equipment or appliance manufacturer's published capacities cannot satisfy both the total and sensible heat gains calculated in accordance with the approved heating and cooling calculation methodology and the next larger standard size unit is specified.
     For permitting, inspections, certificate of compliance or certificate of occupancy, verification of Calculations for HVAC Systems—ACCA Manual D, ACCA Manual J, ACCA Manual S calculation submittals and review shall not be required.

M1401.4 (303.5) Exterior Installations

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Equipment and appliances installed outdoors shall be listed and labeled for outdoor installation. Supports and foundations shall prevent excessive vibration, settlement or movement of the equipment. Supports and foundations shall be in accordance with Section M1305.1.4.1.
In flood hazard areas as established by Table R301.2(1), heating and cooling equipment and appliances shall be located or installed in accordance with Section R322.1.6.

M1402.1 (918.1) General

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Oil-fired central furnaces shall conform to ANSI/UL 727. Electric furnaces shall conform to UL 1995. Solid fuel furnaces shall be tested in accordance with UL 391.
Clearances shall be provided in accordance with the listing and the manufacturer's installation instructions.
Combustion air shall be supplied in accordance with Chapter 17. Combustion air openings shall be unobstructed for a distance of not less than 6 inches (152 mm) in front of the openings.

M1402.4 (918.3) Dampers

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Volume dampers shall not be placed in the air inlet to a furnace in a manner that will reduce the required air to the furnace.

M1402.5 (918.4) Circulating air ducts for forced-air warm-air furnaces

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Circulating air for fuel-burning, forcedair-type, warm-air furnaces shall be conducted into the blower housing from outside the furnace enclosure by continuous air-tight ducts.

M1402.6 (918.5) Outdoor and return air openings

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Outdoor intake openings shall be located in accordance with Section M1602.1. Return air openings shall be located in accordance with Section M1602.2.

M1402.7 (918.6) Outdoor opening protection

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Outdoor air intake openings shall be protected in accordance with Section R303.6.

M1402.8 (918.7) Refrigeration coils in warm-air furnaces

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
When a cooling coil is located in the supply plenum of a warm-air furnace, the furnace blower shall be rated at not less than 0.5-inch water column (124 Pa) static pressure unless the furnace is listed and labeled for use with a cooling coil. Cooling coils shall not be located upstream from heat exchangers unless listed and labeled for such use. Conversion of existing furnaces for use with cooling coils shall be permitted provided the furnace will operate within the temperature rise specified for the furnace.

M1403.1 (918.2) Heat Pumps

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Electric heat pumps shall be listed and labeled in accordance with UL 1995 or UL/CSA/ANCE 60335-2-40.
Refrigeration cooling equipment shall comply with Section M1411.

M1405.1 (929.1) General

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Electric baseboard convectors shall be installed in accordance with the manufacturer's instructions and Chapters 34 through 43 of this code. Electric baseboard heaters shall be listed and labeled in accordance with UL 1042.

M1406.1 (927) General

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Electric radiant heating systems shall be installed in accordance with the manufacturer's instructions and Chapters 34 through 43 of this codethe North Carolina Electrical Code and shall be listed for the application.

M1406.2 Clearances

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Clearances for radiant heating panels or elements to any wiring, outlet boxes and junction boxes used for installing electrical devices or mounting luminaires shall comply with Chapters 34 through 43 of this codethe North Carolina Electrical Code.
Radiant panels installed on wood framing shall conform to the following requirements:

1. Heating panels shall be installed parallel to framing members and secured to the surface of framing members or mounted between framing members.

2. Mechanical fasteners shall penetrate only the unheated portions provided for this purpose. Panels shall not be fastened at any point closer than 1/4 inch (6.4 mm) to an element. Other methods of attachment of the panels shall be in accordance with the panel manufacturer's instructions.

3. Unless listed and labeled for field cutting, heating panels shall be installed as complete units.
Radiant heating systems installed in concrete or masonry shall conform to the following requirements:

1. Radiant heating systems shall be identified as being suitable for the installation, and shall be secured in place as specified in the manufacturer's installation instructions.

2. Radiant heating panels or radiant heating panel sets shall not be installed where they bridge expansion joints unless protected from expansion and contraction.
Finish materials installed over radiant heating panels or systems shall be installed in accordance with the manufacturer's instructions. Surfaces shall be secured so that nails or other fastenings do not pierce the radiant heating elements.

M1407.1 (930.1) General

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Electric duct heaters shall be installed in accordance with the manufacturer's instructions and Chapters 34 through 43 of this codethe North Carolina Electrical Code. Electric duct heaters shall comply with UL 1996.

M1407.2 (930.2) Installation

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Electric duct heaters shall be installed so that they will not create a fire hazard. Class 1 ducts, duct coverings and linings shall be interrupted at each heater to provide the clearances specified in the manufacturer's installation instructions. Such interruptions are not required for duct heaters listed and labeled for zero clearance to combustible materials. Insulation installed in the immediate area of each heater shall be classified for the maximum temperature produced on the duct surface.

M1407.3 (930.3) Installation With Heat Pumps and Air Conditioners

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Duct heaters located within 4 feet (1219 mm) of a heat pump or air conditioner shall be listed and labeled for such installations. The heat pump or air conditioner shall additionally be listed and labeled for such duct heater installations.

M1407.4 (930.4) Access

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Duct heaters shall be accessible for servicing, and clearance shall be maintained to permit adjustment, servicing and replacement of controls and heating elements.

M1407.5 (930.5) Fan interlock

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The fan circuit shall be provided with an interlock to prevent heater operation when the fan is not operating.

M1408.1 (910.1) General

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Oil-fired vented floor furnaces shall comply with UL 729 and shall be installed in accordance with their listing, the manufacturer's instructions and the requirements of this code.

M1408.2 (910.4) Clearances

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Vented floor furnaces shall be installed in accordance with their listing and the manufacturer's instructions.

M1408.3 (910.2) Location

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Location of floor furnaces shall conform to the following requirements:
  1. Floor registers of floor furnaces shall be installed not less than 6 inches (152 mm) from a wall.
  2. Wall registers of floor furnaces shall be installed not less than 6 inches (152 mm) from the adjoining wall at inside corners.
  3. The furnace register shall be located not less than 12 inches (305 mm) from doors in any position, draperies or similar combustible objects.
  4. The furnace register shall be located not less than 5 feet (1524 mm) below any projecting combustible materials.
  5. The floor furnace burner assembly shall not project into an occupied under-floor area.
  6. The floor furnace shall not be installed in concrete floor construction built on grade.
  7. The floor furnace shall not be installed where a door can swing within 12 inches (305 mm) of the grille opening.
An opening in the foundation not less than 18 inches by 24 inches (457 mm by 610 mm), or a trap door not less than 22 inches by 30 inches (559 mm by 762 mm) shall be provided for access to a floor furnace. The opening and passageway shall be large enough to allow replacement of any part of the equipment.

M1408.5 (910.4) Installation

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Floor furnace installations shall conform to the following requirements:
  1. Thermostats controlling floor furnaces shall be located in the room in which the register of the floor furnace is located.
  2. Floor furnaces shall be supported independently of the furnace floor register.
  3. Floor furnaces shall be installed not closer than 6 inches (152 mm) to the ground. The minimum clearance shall be 2 inches (51 mm), where the lower 6 inches (152 mm) of the furnace is sealed to prevent water entry.
  4. Where excavation is required for a floor furnace installation, the excavation shall extend 30 inches (762 mm) beyond the control side of the floor furnace and 12 inches (305 mm) beyond the remaining sides. Excavations shall slope outward from the perimeter of the base of the excavation to the surrounding grade at an angle not exceeding 45 degrees (0.79 rad) from horizontal.
  5. Floor furnaces shall not be supported from the ground.

M1409.1 (909.1) General

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Oil-fired vented wall furnaces shall comply with UL 730 and shall be installed in accordance with their listing, the manufacturer's instructions and the requirements of this code.

M1409.2 (909.2) Location

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The location of vented wall furnaces shall conform to the following requirements:
  1. Vented wall furnaces shall be located where they will not cause a fire hazard to walls, floors, combustible furnishings or doors. Vented wall furnaces installed between bathrooms and adjoining rooms shall not circulate air from bathrooms to other parts of the building.
  2. Vented wall furnaces shall not be located where a door can swing within 12 inches (305 mm) of the furnace air inlet or outlet measured at right angles to the opening. Doorstops or door closers shall not be installed to obtain this clearance.

M1409.3 (909.4) Installation

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Vented wall furnace installations shall conform to the following requirements:
  1. Required wall thicknesses shall be in accordance with the manufacturer's installation instructions.
  2. Ducts shall not be attached to a wall furnace. Casing extensions or boots shall be installed only where listed as part of a listed and labeled appliance.
  3. A manual shut off valve shall be installed ahead of all controls.

M1409.4 (909.6) Access

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Vented wall furnaces shall be provided with access for cleaning of heating surfaces; removal of burners; replacement of sections, motors, controls, filters and other working parts; and for adjustments and lubrication of parts requiring such attention. Panels, grilles and access doors that must be removed for normal servicing operations shall not be attached to the building construction.

M1410.1 (904.1, 922) General

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Vented room heaters shall be tested in accordance with ASTM E1509 for pellet-fuel burning, UL 896 for oil-fired or UL 1482 for solid fuel-fired and installed in accordance with their listing, the manufacturer's installation instructions and the requirements of this code.
Room heaters shall be installed on noncombustible floors or approved assemblies constructed of noncombustible materials that extend not less than 18 inches (457 mm) beyond the appliance on all sides.

Exceptions:

1. Listed room heaters shall be installed on noncombustible floors, assemblies constructed of noncombustible materials or floor protectors listed and labeled in accordance with UL 1618. The materials and dimensions shall be in accordance with the appliance manufacturer's instructions.

2. Room heaters listed for installation on combustible floors without floor protection shall be installed in accordance with the appliance manufacturer's instructions.

M1410.3 (905.3) Hearth extensions

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Hearth extensions for fireplace stoves shall be installed in accordance with the listing of the fireplace stove. The hearth extension shall be readily distinguishable from the surrounding floor area. Listed and labeled hearth extensions shall comply with UL 1618.
Refrigerants used in direct refrigerating systems shall conform to the applicable provisions of ANSI/ASHRAE 34.

M1411.2 Refrigeration Coils in Warm-Air Furnaces

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Where a cooling coil is located in the supply plenum of a warm-air furnace, the furnace blower shall be rated at not less than 0.5-inch water column (124 Pa) static pressure unless the furnace is listed and labeled for use with a cooling coil. Cooling coils shall not be located upstream from heat exchangers unless listed and labeled for such use. Conversion of existing furnaces for use with cooling coils shall be permitted provided the furnace will operate within the temperature rise specified for the furnace.
UpCodes note: See Section M1402.8.

M1411.3 (307.2) Condensate Disposal

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Condensate from cooling coils, condensing furnaces and evaporators shall be conveyed from the drain pan outlet to an approved place of disposal. Such piping shall maintain a minimum horizontal slope in the direction of discharge of not less than 1/8 unit vertical in 12 units horizontal (1-percent slope). Where pumps are used, they shall be installed with a factory-equipped auxiliary high-level switch that shall shut off equipment served upon activation of the auxiliary high-level switch. Where damage to any building components will occur as a result of overflow from the pump, the pump shall also be located in the auxiliary drain pan or in a separate drain pan equipped with a separate drain line or water-level detection device. Condensate shall not discharge into a street, alley or other areas where it would cause a nuisance.

M1411.3.1 Auxiliary and Secondary Drain Systems

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
In addition to the requirements of Section M1411.3, a secondary drain or auxiliary drain pan shall be required for each cooling or evaporator coil where damage to any building components will occur as a result of overflow from the equipment drain pan or stoppage in the condensate drain piping. Such piping shall maintain a minimum horizontal slope in the direction of discharge of not less than 1/8 unit vertical in 12 units horizontal (1-percent slope). Drain piping shall be not less than 3/4-inch (19 mm) nominal pipe size. One of the following methods shall be used:
  1. An auxiliary drain pan with a separate drain shall be installed under the coils on which condensation will occur. The auxiliary pan drain shall discharge to a conspicuous point of disposal to alert occupants in the event of a stoppage of the primary drain. The pan shall have a minimum depth of 1.5 inches (38 mm), shall be not less than 3 inches (76 mm) larger than the unit or the coil dimensions in width and length and shall be constructed of corrosion-resistant material. Galvanized sheet steel pans shall have a minimum thickness of not less than 0.0236-inch (0.6010 mm) (No. 24 Gage). Nonmetallic pans shall have a minimum thickness of not less than 0.0625 inch (1.6 mm).
    1. Appliances with primary condensate pans above appliance components. Cooling coils mounted above the air handler or furnace shall have a secondary drain piped to auxiliary pan under the air handler to avoid condensate migrating through appliance components before reaching the auxiliary drain pan.
  2. A separate overflow drain line shall be connected to the drain pan installed with the equipment. This overflow drain shall discharge to a conspicuous point of disposal to alert occupants in the event of a stoppage of the primary drain. The overflow drain line shall connect to the drain pan at a higher level than the primary drain connection.
  3. An auxiliary drain pan without a separate drain line shall be installed under the coils on which condensation will occur. This pan shall be equipped with a water level detection device conforming to UL 508 that will shut off the equipment served prior to overflow of the pan. The pan shall be equipped with a fitting to allow for drainage. The auxiliary drain pan shall be constructed in accordance with Item 1 of this section.
  4. A water level detection device conforming to UL 508 shall be installed that will shut off the equipment served in the event that the primary drain is blocked. The device shall be installed in the primary drain line, upstream of the primary drain line trap, the overflow drain line or the equipment-supplied drain pan, located at a point higher than the primary drain line connection and below the overflow rim of such pan.
Exception: Fuel-fired appliances that automatically shut down operation in the event of a stoppage in the condensate drainage system.

M1411.3.1.1 (307.2.3.1) Water-Level Monitoring Devices

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
On down-flow units and other coils that do not have secondary drain or provisions to install a secondary or auxiliary drain pan, a water-level monitoring device shall be installed inside the primary drain pan. This device shall shut off the equipment served in the event that the primary drain becomes restricted. Devices shall not be installed in the drain line.

M1411.3.2 (307.2.2) Drain Pipe Materials and Sizes

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Components of the condensate disposal system shall be ABS, cast iron, copper, cross-linked polyethylene, CPVC, galvanized steel, PE-RT, polyethylene, polypropylene or PVC pipe or tubing. Components shall be selected for the pressure and temperature rating of the installation. Joints and connections shall be made in accordance with the applicable provisions of Chapter 30. Condensate waste and drain line size shall be not less than 3/4-inch (19 mm) nominal diameter from the drain pan connection to the place of condensate disposal. Where the drain pipes from more than one unit are manifolded together for condensate drainage, the pipe or tubing shall be sized in accordance with an approved method.
Condensate drain lines shall be configured to permit the clearing of blockages and performance of maintenance without requiring the drain line to be cut.

M1411.3.4 (307.2.3.2) Appliances, Equipment and Insulation in Pans

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Where appliances, equipment or insulation are subject to water damage when auxiliary drain pans fill, those portions of the appliances, equipment and insulation shall be installed above the flood level rim of the pan. Supports located inside of the pan to support the appliance or equipment shall be water resistant and approved.

M1411.3.5 (307.2.4) Traps

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Condensate drains shall be trapped as required by the equipment or appliance manufacturer.

M1411.3.5.1 (307.2.4.1) Ductless mini-split system traps

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Ductless mini-split equipment that produces condensate shall be provided with an inline check valve located in the drain line, or a trap.

M1411.4 (307.3) Condensate Pumps

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Condensate pumps located in uninhabitable spaces, such as attics and crawl spaces, shall be connected to the appliance or equipment served such that when the pump fails, the appliance or equipment will be prevented from operating. Pumps shall be installed in accordance with the manufacturer's instructions.
Category IV condensing appliances shall have an auxiliary drain pan where damage to any building component will occur as a result of stoppage in the condensate drainage system. These pans shall be installed in accordance with the applicable provisions of Section M1411.3.

Exception: Fuel-fired appliances that automatically shut down operation in the event of a stoppage in the condensate drainage system.

M1411.6 Insulation of Refrigerant Piping

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Piping and fittings for refrigerant vapor (suction) lines shall be insulated with insulation having a thermal resistivity of not less than R-4R-3 and having external surface permeance not exceeding 0.05 perm [2.87 ng/(s m2 Pa)] when tested in accordance with ASTM E96. Insulation shall be protected in accordance with Section N1103.3.1.

M1411.7 Location and Protection of Refrigerant Piping

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Refrigerant piping installed within 11/2 inches (38 mm) of the underside of roof decks shall be protected from damage caused by nails and other fasteners.

M1411.8 Locking Access Port Caps

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Refrigerant circuit access ports located outdoors shall be fitted with locking-type tamper-resistant caps or shall be otherwise secured to prevent unauthorized access.

Section M1412 Absorption Cooling Equipment

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.

M1412.1 Approval of Equipment

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Absorption systems shall be installed in accordance with the manufacturer's instructions. Absorption equipment shall comply with UL 1995 or UL/CSA/ANCE 60335-2-40.

M1412.2 Condensate Disposal

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Condensate from the cooling coil shall be disposed of as provided in Section M1411.3.

M1412.3 Insulation of Piping

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Refrigerant piping, brine piping and fittings within a building shall be insulated to prevent condensation from forming on piping.

M1412.4 Pressure-Relief Protection

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Absorption systems shall be protected by a pressure-relief device. Discharge from the pressure-relief device shall be located where it will not create a hazard to persons or property.

Section M1413 Evaporative Cooling Equipment

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.

M1413.1 General

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Evaporative cooling equipment and appliances shall comply with UL 1995 or UL/CSA/ANCE 60335-2-40 and shall be installed:

1. In accordance with the manufacturer's instructions.

2. On level platforms in accordance with Section M1305.1.4.1.

3. So that openings in exterior walls are flashed in accordance with Section R703.4.

4. So as to protect the potable water supply in accordance with Section P2902.

5. So that air intake opening locations are in accordance with Section R303.5.1.

M1414.1 (905.1) General

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Fireplace stoves shall be listed, labeled and installed in accordance with the terms of the listing. Fireplace stoves shall be tested in accordance with UL 737. Fireplace inserts intended for installation in fireplaces shall be listed and labeled in accordance with the requirements of UL 1482 and shall be installed in accordance with the manufacturer’s instructions.

M1414.2 (905.2) Connection to fireplace

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The connection of solid fuel appliances to chimney flues serving fireplaces shall comply with Sections M1803.4 and M1805.3.1.

M1414.2 M1414.3 (905.3) Hearth Extensions

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Hearth extensions for fireplace stoves shall be installed in accordance with the listing of the fireplace stove. The supporting structure for a hearth extension for a fireplace stove shall be at the same level as the supporting structure for the fireplace unit. The hearth extension shall be readily distinguishable from the surrounding floor area.
Masonry heaters shall be constructed in accordance with Section R1002.

Section M1416 FACTORY-BUILT FIREPLACES

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.

M1416.1 (R1004.1) General

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Factory-built fireplaces shall be listed and labeled and shall be installed in accordance with the conditions of the listing. Factory-built fireplaces shall be tested in accordance with UL 127.

M1416.2 (R1004.2) Hearth extensions

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Hearth extensions of approved factory-built fireplaces shall be installed in accordance with the listing of the fireplace. The hearth extension shall be readily distinguishable from the surrounding floor area. Listed and labeled hearth extensions shall comply with UL 1618.

M1416.3 (R1004.3) Decorative shrouds

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Decorative shrouds shall not be installed at the termination of chimneys for factory-built fireplace systems and installed in accordance with the manufacturer’s instructions.

M1416.4 (R1004.4) Unvented gas log heaters

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
An unvented gas log heater shall not be installed in a factory-built fireplace unless the fireplace system has been specifically tested, listed and labeled for such use in accordance with UL 127.

M1416.5 (R1004.5) Gasketed fireplace doors

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
A gasketed fireplace door shall not be installed on a factory-built fireplace except where the fireplace system has been specifically tested, listed and labeled for such use in accordance with UL 127.
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