Quick question: I have a Trane XR80 in the attic, horizontal. Flue pipe comes out of one end of the furnace a few feet to elbow, and up to roof.
Between the furnace and the flue pipe exiting the furnace, there is 1/4" gap all around the opening, with a warmth exiting from the furnace. Is this supposed to be left to ventilate the inside of the furnace or something? Or can I seal this with appropriate foil tape, etc.?
I have just found sap around a number of rafters in attic and so besides for the attic ventilation exits, I am trying to seal off any systemic leaks in attic (not to mention our natural gas bill!).
Last edited by 99altrade; 12-21-2010 at 11:38 AM.
Reason: Wrong Thread Location. Sorry.