Duct Trunk Alternatives
I suppose it's possible I'm crazy, but is there a good reason not to use plastic for main trunks on my forced air furnace? My initial concerns were off gassing, mold, and static electrity. From what I'm reading, HDPE doesn't have the off gassing problems of polypropylene, doesn't have mildew problems (plus, I don't have air conditioning anyway), and I'm totally unsure of whether static electricity would be a problem.
I've seen the foil-faced cardboard panels for return air and was thinking the same type of thing should work for hot air. Initially I thought corrugated HDPE would be best as it would insulate as well, but I'm not sure if that would be worth the price compared to regular HDPE panels. EIther should install easily and may be a lot cheaper than metal.
So, any thoughts?