Quote:
Originally Posted by jwslam
So I have my house completely sealed, and I turn on the hood fan / bathroom fans. Where does make-up air come from? I draw a vacuum inside my house and my fireplace flames go to fuuuuu
Source: personal experience in 2017 built house
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Well for sure you don't want it coming through the walls, ceilings, etc. You have make up air coming into your furnace, which should compensate for any exhaust from hood fans/bathroom fans. If you have a vacuum inside your house which affects the fireplace flame, then your mechanical system isn't balanced properly. Also, you have fresh air intake to your fireplace, which may be the problem - ie - not enough fresh air coming in.