Page 528 - 2018_IRC

CHAPTER 14

HEATING AND COOLING EQUIPMENT AND APPLIANCES

User notes:
About this chapter: Chapter 14 addresses the indoor environmental control systems and appliances typically found in dwelling units. Cover-
age includes general requirements for equipment and appliance sizing, condensate disposal, access and support, and specific coverage for
more than a dozen different types of space conditioning equipment and appliances common to dwelling units.
Code development reminder: Code change proposals to this chapter will be considered by the IRC—Plumbing/Mechanical Code Develop-
ment Committee during the 2018 (Group A) Code Development Cycle. See explanation on page iv.

SECTION M1401 ports and foundations shall be in accordance with Section
GENERAL M1305.1.3.1.
M1401.1 Installation. Heating and cooling equipment and M1401.5 Flood hazard. In flood hazard areas as established
appliances shall be installed in accordance with the manufac- by Table R301.2(1), heating and cooling equipment and
turer’s instructions and the requirements of this code. appliances shall be located or installed in accordance with
Section R322.1.6.
M1401.2 Access. Heating and cooling equipment and appli-
ances shall be located with respect to building construction
and other equipment and appliances to permit maintenance,
servicing and replacement. Clearances shall be maintained to SECTION M1402
permit cleaning of heating and cooling surfaces; replacement CENTRAL FURNACES
of filters, blowers, motors, controls and vent connections; M1402.1 General. Oil-fired central furnaces shall conform
lubrication of moving parts; and adjustments. to ANSI/UL 727. Electric furnaces shall conform to UL
1995.
Exception: Access shall not be required for ducts, piping,
or other components approved for concealment. M1402.2 Clearances. Clearances shall be provided in accor-
dance with the listing and the manufacturer’s installation
M1401.3 Equipment and appliance sizing. Heating and instructions.
cooling equipment and appliances shall be sized in accor-
dance with ACCA Manual S or other approved sizing meth- M1402.3 Combustion air. Combustion air shall be supplied
odologies based on building loads calculated in accordance in accordance with Chapter 17. Combustion air openings
with ACCA Manual J or other approved heating and cooling shall be unobstructed for a distance of not less than 6 inches
calculation methodologies. (152 mm) in front of the openings.

Exception: Heating and cooling equipment and appliance
sizing shall not be limited to the capacities determined in SECTION M1403
accordance with Manual S where either of the following HEAT PUMP EQUIPMENT
conditions applies:
M1403.1 Heat pumps. Electric heat pumps shall be listed
1. The specified equipment or appliance utilizes multi- and labeled in accordance with UL 1995 or UL/CSA/ANCE
stage technology or variable refrigerant flow tech- 60335-2-40.
nology and the loads calculated in accordance with
the approved heating and cooling calculation meth-
odology are within the range of the manufacturer’s SECTION M1404
published capacities for that equipment or appliance. REFRIGERATION COOLING EQUIPMENT
2. The specified equipment or appliance manufac- M1404.1 Compliance. Refrigeration cooling equipment shall
turer’s published capacities cannot satisfy both the comply with Section M1411.
total and sensible heat gains calculated in accor-
dance with the approved heating and cooling calcu-
lation methodology and the next larger standard size SECTION M1405
unit is specified. BASEBOARD CONVECTORS

M1401.4 Outdoor installations. Equipment and appliances M1405.1 General. Electric baseboard convectors shall be
installed outdoors shall be listed and labeled for outdoor installed in accordance with the manufacturer’s instructions
installation. Supports and foundations shall prevent excessive and Chapters 34 through 43. Electric baseboard heaters shall
vibration, settlement or movement of the equipment. Sup- be listed and labeled in accordance with UL 1042.

2018 INTERNATIONAL RESIDENTIAL CODE ® 503
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