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Old 05-01-2017, 08:27 AM   #8
vipermanden
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Join Date: Apr 2016
Location: North Lake Tahoe
Posts: 639
M.O.C. #18510
We figured it out. We had our fan on in the bathroom, with the door closed to keep our bathroom dry, and it was sucking air in from where ever it could get it. We turned off the fan, and the air stopped coming in from the stair vent, which is 20 feet away! I will make something to block it, that is easy to pull away when we want to use the furnace.

Thanks
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