8
DAMPER
If the draft exceeds -0.06 w.c., a barometric damper must installed. The barometric damper must be adjusted so
that the maximum draft measured at the furnace outlet is limited to -0.06 in. w.c. Please note that a draft higher than
-0.06 w.c. will reduce efficiency and could result in an uncontrollable fire.
On the other hand, the minimum draft
to be respected is -0.04 in. w.c. in the evacuation pipe on the solid fuel side, no matter what type of furnace
(WOOD, WOOD / ELECTRIC OR WOOD / OIL).
COMBUSTION AIR
When the furnace and the chimney are completely cold, it might be necessary to provide fresh air by opening a door
or a window for a few minutes while lighting the fire.
Take note that a house constructed or renovated in order to be airtight is liable to lack fresh air necessary for the
proper combustion of a flame producing heating appliance.
In such a case, when starting up the fire, do not operate appliances which evacuate air outside the house such
as:
- Range
hood
- Air
exchanger
- Clothes
dryer
- Bathroom
fan
-
Ventilated central vacuum system
NOTE:
It is recommended to install an outside air inlet of minimum 4” diameter in the room where the heating appliance is
installed (see drawing below). It is preferable to choose a wall which is not exposed to dominant winds, depending
on the conditions surrounding your house.
N.B. The owner of the furnace is responsible for the room salubrity in case of negative pressure or
temporary negative pressure.
Insulated conduit full length
Fresh air
intake
Exterior
wall
Free air
entry
