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So I have been having trouble heating my home. I noticed today that there is a vent blowing hot air outside. It is not the return, chimney or venting. Any ideas other that the builder thought we should all play our part in global climate control?

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Do you mean that one of your air ducts leading from the furnace goes to the outside of your house? If so, I don't think any of us can answer 'why' it was done that way. It does seem illogical. –  DA01 Feb 18 '13 at 5:07
    
Sounds like you need an HVAC expert who knows the brand of equipment in to have a look and make sure it was properly installed. –  Fiasco Labs Feb 18 '13 at 16:40
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Are you sure it's not a vent, or an exhaust fan from a bathroom or something? –  Henry Jackson Feb 18 '13 at 16:45
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