DIY Home Repair Forum: HVAC
01-26-2008, 04:17 PM
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Replies: 12
Views: 18,034
Is outside air really needed for a furnace?
I live in a 40 year old home in Boulder, Colorado. It has a high efficiency natural gas furnace that's one year old. We bought the place after this was installed. I've found an 8 inch round air...
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