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802.2 Connection to Venting Systems
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Except as permitted
in Section 802.2.1 through Section 802.2.8, all appliances
shall be connected to venting systems. [NFPA 54:12.3.1]
The following appliances shall not be required to be
vented:
- Listed ranges.
- Built-in domestic cooking units listed and marked for optional venting.
- Listed hot plates and listed laundry stoves.
- Listed Type 1 clothes dryers exhausted in accordance with Section 504.4.
- A single listed booster-type (automatic instantaneous) water heater, when designed and used solely for the sanitizing rinse requirements of a dishwashing machine, provided that the appliance is installed with the draft hood in place and unaltered, if a draft hood is required, in a commercial kitchen having a mechanical exhaust system; where installed in this manner, the draft hood outlet shall not be less than 36 inches (914 mm) vertically and 6 inches (152 mm) horizontally from any surface other than the appliance.
- Listed refrigerators.
- Counter appliances.
- Room heaters listed for unvented use.
- Direct gas-fired makeup air heaters.
- Other appliances listed for unvented use and not provided with flue collars.
- Specialized appliances of limited input such as laboratory burners or gas lights. [NFPA 54:12.3.2]
Where any or all of the appliances in Section 802.2.1(5) through Section
802.2.1(11) are installed so the aggregate input rating
exceeds 20 Btu/hr/ft3 (207 W/m3) of room or space in
which it is installed, one or more shall be provided with
venting systems or other approved means for conveying
the vent gases to the outdoors so the aggregate input rating
of the remaining unvented appliances does not
exceed 20 Btu/hr/ft3 (207 W/m3). [NFPA 54:12.3.2.1]
Where the calculation includes the volume of an adjacent room or space,
the room or space in which the appliances are installed shall be directly connected to the adjacent room or space
by a doorway, archway, or other opening of comparable
size that cannot be closed. [NFPA 54:12.3.2.2]
Ventilating hoods and
exhaust systems shall be permitted to be used to vent
appliances installed in commercial applications and to
vent industrial appliances, particularly where the process
itself requires fume disposal. [NFPA 54:12.3.3]
The operation of
industrial appliances such that its flue gases are discharged
directly into a large and well-ventilated space
shall be permitted. [NFPA 54:12.3.4]
Listed direct-vent
appliances shall be installed in accordance with the manufacturer's
installation instructions and Section 802.8.2. [NFPA 54:12.3.5]
Appliances incorporating integral venting means shall be
installed in accordance with the manufacturer's installation
instructions, Section 802.8, and Section 802.8.1. [NFPA 54:12.3.6]
Commercial industrial-type
incinerators shall be vented in accordance with NFPA 82.
[NFPA 54:12.3.7]
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802.2.3 Chimneys and Vents, Adjacent Room or Space
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California Mechanical Code 2019 > 8 Chimneys and Vents > 802.0 Venting of Appliances > 802.2 Connection to Venting Systems > 802.2.3 Adjacent Room or Space