J&R MANUFACTURING SMOKE-MASTER, Operation And Service Manual

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Venting Requirements
Our barbecue ovens are listed under multiple standards, including U.L. 737 (Fireplace
Stoves), U.L. 2162 (Commercial Wood-Fired Baking Ovens), and U.L. 391 (Solid-Fuel
and Combination-Fuel Central and Supplementary Furnaces. These listing provide two
alternatives for exhausting our units: direct venting and exhaust hood venting.
In all cases, it is imperative to obtain the approval of the AHJ (Authority Having
Jurisdiction). This will typically be the mechanical inspection department of the
local municipality’s building inspection division and/or the local fire marshal.
Our listings under U.L. 737 and U.L. 391 permit direct venting and the
ventilation standard cited in each is NFPA 211 (Standard for Chimneys,
Fireplaces, Vents, and Solid-Fuel Burning Appliances). All of our enclosed
ovens are designed to be vented via a smokestack (chimney) with natural draft.
All models incorporate smoke-control (bypass) mechanisms to contain smoke
spillage when the oven doors or firebox doors are opened.
In all cases in which combustible construction is present, a factory-built Type
HT chimney is required (refer to NFPA 211 6.3.1.2 and U.L. 103). Examples of
such chimneys would be Selkirk “Ultra-Temp” and DuraVent “DuraTech”.
Option One :
Direct Venting
provide ventilation and combustion air supply to allow proper combustion of
fuel, chimney draft, and maintenance of safe temperatures… where buildings
are so tight that normal infiltration does not provide the necessary air, outside
air shall be introduced.”
Option Two: Exhaust Hood Venting
U.L. 2162 cites NFPA 96 (Standard for Ventilation Control and Fire Protection
If no combustible construction is present (examples: exterior installations or
installations in which the oven is faced into a non-combustible exterior wall
and the chimney is either uncovered or covered with a non-combustible
weather covering), then a single wall metal chimney
(Figure 5B) is acceptable
if approved by the AHJ.
Combustion Air
Make sure adequate combustion air is available. Excerpt from NFPA 211 12.3:
“Solid-fuel burning devices shall be installed in a location and manner so as to
provide ventilation and combustion air supply to allow proper combustion of
fuel, chimney draft, and maintenance of safe temperatures… where buildings
are so tight that normal infiltration does not provide the necessary air, outside
air shall be introduced.”
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