Originally Posted By: Kris Beck
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I am an amature running 14" of galvanized 1" from outside of the house through the cinder block wall and then connecting to 3/4" black iron on the inside, and then going to the heater. Is this OK? The guy at Home Depot kind of questioned it today. That is what I was told to do by my uncle who works for a commercial duct company in Jersey. I live in Jersey. It is to prevent being weathered. What do you all think? Thanks