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11-07-2007, 08:17 AM #1
Combustion air from inside house or outside.
When installing an infinity condensing gas furnace is an inside source of combustion air preferable to an outside source? also is there great concen over the lenth of an exhaust pipe . installer intends to run the exhaust pipe up an old unused furnance chase for the the exhaust. Does the exhaust pipe need to be insulated? thnaks