23 Jan '12, 7pm

Green Building Q&A: Are HVAC ducts a factor in heat loss?

The R60 ducts I have released are not cumbersome, they are simple, inexpensive, and very easy to put in. And they are intended for older energy upgrades. So I think you answered my question - they are a factor, so now I must ask, can you help me quantify the factor? I know that standard ducts are usually rated about R6. So heat can travel up the duct and be lost through the duct walls in the attic. Has anyone calculated the amount of heat loss?

Full article: http://www.greenbuildingadvisor.com/community/forum/energ...

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