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Last question about my nightmare. Please answer only if you have HVAC knowledge?

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  • Last question about my nightmare. Please answer only if you have HVAC knowledge?


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Answer #1 | 22/12 2013 20:58
Yes, yes it can. A furnace needs combustion air (air for the fire) This air is usually supplied from the outside of the house so the fire in the furnace doesn't burn or consume all the oxygen in the house. So when the house (or your window) is closed there is no flow of air or positive pressure in the house. However when you open the window you create negative pressure in the house thus the air flows from the furnace room backwards through the return air vent to the outside through your open window. The same thing happens when the furnace is on only the combustion air enters the furnace gets heated and depleted of oxygen and rises thru the flue usually to the roof of the house.
Answer #2 | 23/12 2013 06:21
I'd say yes.

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