3.2.9 Smoking – Causes and Troubleshooting
To reduce the likelihood of smoking when opening the door, set the combustion air controls to the left 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 continue. If the fireplace continues to smoke it is probably for one of the following reasons:
A.Negative pressure in the house
As the fire burns, air goes up the chimney. This air must be replaced through leakage into the house or through the outside air duct. When operating the BRENTWOOD, open a nearby window temporarily to check if there is adequate air supply replacement.
B.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.
C.Wet wood
Wet or tarred wood will smoulder and smoke instead of burn properly.
D.Dirty or blocked chimney
Check to make sure the chimney is clear and clean.
E.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.
F.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
G.Blower for central forced air kit operating
Make sure that the blower is at the "off" position when you open the fireplace door for reloading.
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