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Section 303 Equipment and Appliance Location

Mechanical Code 2021 of Colorado > 3 General Regulations > 303 Equipment and Appliance Location

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303.1 General

Equipment and appliances shall be located as required by this section, specific requirements elsewhere in this code and the conditions of the equipment and appliance listing.

303.2 Hazardous Locations

Appliances shall not be located in a hazardous location unless listed and approved for the specific installation.

303.3 Prohibited Locations

Fuel-fired appliances shall not be located in, or obtain combustion air from, any of the following rooms or spaces:

Sleeping rooms.
Bathrooms.
Toilet rooms.
Storage closets.
Surgical rooms.

Exception: This section shall not apply to the following appliances:

Direct-vent appliances that obtain all combustion air directly from the outdoors.
Solid fuel-fired appliances, provided that combustion air is provided in accordance with the manufacturer's instructions.
Appliances installed in a dedicated enclosure in which all combustion air is taken directly from the outdoors, in accordance with Chapter 7. Access to such enclosure shall be through a solid door, weather-stripped in accordance with the exterior door air leakage requirements of the International Energy Conservation Code and equipped with an approved self-closing device.

303.4 Protection From Damage

Appliances shall not be installed in a location where subject to mechanical damage unless protected by approved barriers.

303.5 Indoor Locations

Furnaces and boilers installed in closets and alcoves shall be listed for such installation.

303.6 Outdoor Locations

Appliances installed in other than indoor locations shall be listed and labeled for outdoor installation.

Appliances installed in pits or excavations shall not come in direct contact with the surrounding soil and shall be installed not less than 3 inches (76 mm) above the pit floor. The sides of the pit or excavation shall be held back not less than 12 inches (305 mm) from the appliance. Where the depth exceeds 12 inches (305 mm) below adjoining grade, the walls of the pit or excavation shall be lined with concrete or masonry. Such concrete or masonry shall extend not less than 4 inches (102 mm) above adjoining grade and shall have sufficient lateral load-bearing capacity to resist collapse. Excavation on the control side of the appliance shall extend not less than 30 inches (762 mm) horizontally. The appliance shall be protected from flooding in an approved manner.