blazenut Posted January 6, 2010 Report Share Posted January 6, 2010 I was at a home today that had a high efficiency furnace with pvc intake and exhaust (see pics below). As you can see they joined in the attic before a single pipe exited the home. Why would one do this? I would think that this would re-use the exhaust as intake-no? I havent seen this before. Thoughts would be appreciated. Click to Enlarge 47.96 KB Click to Enlarge 25.63 KB Click to Enlarge 44.86 KB Click to Enlarge 30.33 KB Quote Link to comment Share on other sites More sharing options...
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