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3.2.11 Smoking – Causes and Troubleshooting
To reduce the likelihood of smoke coming into the room when opening the door, set the
combustion air controls to the left (“Accelerated Combustion”) before opening the door.
Your fireplace has been designed and tested to provide smoke free operation. Occasionally,
there may be a small amount of smoking upon lighting the fire, until the chimney heats up
but this should not last. If the fireplace continues to smoke it is probably for one of the
following reasons:
A. The doors are partially opened
When you open the doors, open them completely.
B. Negative pressure in the house
As the fire burns, air goes up the chimney. This air must be replaced through the outside
air duct. When operating the BIS TRADITION, open a nearby window temporarily to
check if there is adequate air supply replacement.
C. Fans operating (e.g.: range hood)
These fans draw air out of the house and may actually cause a negative pressure in the
house. Turn off all fans and open a nearby window to determine if this is the cause of
the problem.
D. Wet wood
Wet or tarred wood will smoulder and smoke instead of burn properly.
E. Dirty or blocked chimney
Check to make sure the chimney is clear and clean.
F. Chimney not long enough
The minimum chimney height is 12 ft. not including the fireplace height. The chimney
must extend at least 3 feet (915 mm) above its point of contact with the roof and at least
2 feet (610 mm) higher than any roof or wall within 10 feet (3 m) of it. When installed
with offsets, the minimum chimney height is 15 ft. Additional height will increase
draught and will decrease the tendency to smoke.
G. Poor chimney draft
With no fire, there should be sufficient draught to exhaust cigarette smoke introduced
under the baffle. Chimneys installed against an outside wall without protection may
generate back draught problems which will cause start-up problems. To prevent this,
open a nearby window; roll up a piece of paper, light it and hold it in the upper part of
the firebox to warm up the chimney. Wait until the draught is sufficient, then start the
fire.
H. Blower for central forced air kit operating
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