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Page 56
Installation and operation manual - Bistro woodburning cookstove
ENGLISH
11. Combustion Air
For the cookstove draft to work correctly, the room must have an outside or fresh air inlet, with
a minimum of 5" diameter, from the house exterior to the room, that is at least sufficient to
replenish the volume of air that comes out of the chimney flue. In well insulated houses an air
inlet must be fitted through the outer wall that is not exposed to the prevailing winds, depending
on the surrounding conditions of the house. If a vent is installed, it must be fitted in such a way
that it cannot be blocked. A fresh air intake register with a airtight damper may be installed to
help prevent any uncomfortable air draft.
When the cookstove and the chimney are completely cold, it may be necessary before starting
up to provide an external air supply by opening a door or a window for a short period. A
house constructed or renovated in a waterproof manner is prone to not having the air exchange
required for the proper functioning of a wood heating appliance.
In that case, avoid, during startups, to use appliances that evacuate air outside of the house,
such as:
• Cookstove hood
• Bathroom vent
• Air exchange system
• Ventilated central vacuum cleaner
• Dryer
The supply of fresh combustion air can be done in several ways, provided they comply with CSA
B365 and NFPA211.
In Canada, wood stoves are not required to have a combustion air supply from outside, except
for mobile homes. Research has shown that outside air supply do not compensate for the
depressurization of the house and may not be sufficient to provide a supply of combustion air in
windy weather. However, to reduce the risks against smoke spillage due to house depressurization,
a carbon monoxide (CO) detector is required in the room where the stove is installed. The CO
detector will provide warning if for any reason the wood stove fails to function correctly.
11.1 Mobile home
This stove is ‘mobile home approved’. It must therefore have a supply of combustion air from
outdoors. The air intake must not draw air from the attic, from the basement, from a garage or
any enclosed space. Air must be drawn from a ventilated crawl space under the floor or directly
from outside. Install a flexible or rigid, insulated pipe (HVAC type, must comply to ULC S110
and/or UL 181, Class 0 or Class 1) to the fresh air intake.
Where a mobile home has been converted to a standard house by mounting it on a permanent
basement foundation, the supply of outdoor air is not required.
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