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How to Seal Around Exterior Furnace Vents - SFGATE
WebThere’s a simple but critical two-step process to do this. To properly seal around air vents, apply caulk or expanding foam between the ducting … WebJan 3, 2009 · I was going through an existing 8" hole in my wall from a previous wood stove install. I installed the thimble for the pellet stove and used the Fireblocker spray foam to fill in the gap that was left between the thimble and the 8" hole. So far there has been no problem and I don't expect any. The outer ring on the thimble is your heat shield. church internal audit guidelines
How To Seal Air Vents Correctly: 2 Steps To Energy Savings
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