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#225002 - 11/21/05 05:12 PM hole in furnace exhaust pipe ok?
sxzwang Offline

Registered: 07/03/02
Posts: 236
Loc: MA
I noticed a hole in the exhaust pipe that goes from the furnace to the chimney. Is that ok? Not sure why it's there. Can I put a piece of duct tape over it?

#225003 - 11/21/05 07:30 PM Re: hole in furnace exhaust pipe ok?
HeatPro Offline
Carpal Tunnel

Registered: 07/30/04
Posts: 28022
Loc: South New Jersey
1/4-inch holes are often there to take draft and combustion tester readings. They should be plugged by a little sheetmetal plug. Duct tape would fall off in time due to the heat. Not much comes out of the hole - in fact, a good draft will suck some small amount of room air into the hole - but technically, it should be plugged even if it doesn't do harm.
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