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-   -   Cold Air from Ceiling Vent and Bathroom Fan (http://www.diychatroom.com/f17/cold-air-ceiling-vent-bathroom-fan-92242/)

thehendrix 01-13-2011 10:31 PM

Cold Air from Ceiling Vent and Bathroom Fan
 
I have:

a newer gas furnace
port package (I live near an airport so my house is airtight, quad paned windows)
a ceiling vent about 50 feet from the furnace (cold air coming from it all of the sudden)
a bathroom fan (suddenly cold air coming from it)
a vent in the wall at opposite sides of the house, that can be opened or closed (I closed them earlier in the winter because cold air was coming from them
a damper switch on the furnace (my two old may have switched it off from on, I dont know)
a fan switch on the furnace

Question : why is cold air suddenly coming from the ceiling vent and bathroom exhaust fan


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