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11. STALE AIR RETURN SySTEM
The stale air return system is used to extract humid, stale air from the areas of the dwelling
where the worst air quality conditions might exist. These may include areas such as laundry
rooms, bathrooms and kitchens. Note that C.S.A. Standard F326 requires that air be exhausted
from each room with a forced air furnace.
Wall stud spaces can be used as ducting for high wall returns provided that they are lined with
galvanized metal.
Note: Check local code compliance before implementing.
Adjustable “Tech Grills” are recommended for use in the return air system. They can be wall
or ceiling mounted thereby permitting balancing of the air being exhausted. Stale air return
grills should be located at opposite ends in the room to the fresh air grills to ensure good air
exchange.
Please note that the exhaust air stream from a kitchen area must never be connected to the
kitchen range hood. Instead an exhaust grill should be mounted high on the wall as required
by local codes so as not to extract cooking by products.
Summary of Contents for Proventor II Series
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