My wood burner fireplace insert is leaking cold air into the house (and
sucking out the heated air I'm sure). I know the damper is closing
completely and I think the outside air is coming down between the walls
of the double-wall pipe. I've tried to find insulation to put in the
void to stop the flow but haven't had any luck. Does anyone know if
there is a specially designed insulation for use in such hot
environments? Will regular insulation withstand the heat (minus the
paper)? Your help would be appreciated.
If nothing else, a small piece of door gasket material for a woodstove
might work in a pinch. If the B-vent pipe is leaking, it might be
something you should think about replacing, since I don't think they're
supposed to do that.
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