HRV duct questions
I’m about to pull the trigger on an HRV for my home and have a few general questions about duct going to and from the HRV unit. The unit I am considering is the Broan HRV160TE and they state that 6″ insulated flex duct should be used for the incoming fresh air and the exhausting stale air. Everything I have read here says to use hard duct wherever possible due to less resistance. I’ll have a 19′ straight run of fresh air duct going to the unit, and a 6′ mostly straight run of exhaust duct. Could rigid metal duct be used with a decent amount of insulation covering it or would condensation still be a problem? Is there any other material for these runs that could be used in place of the flex duct? I have read on a few posts about using pvc or polypropylene pipes instead – yea or nay? Or am I over thinking this and should just do what is stated in the install manual? Zone 7, Anchorage Alaska. 1972 split entry home with 4″ rigid insulation installed (remote wall) a few years ago, will be tearing out sheetrock soon.
GBA Detail Library
A collection of one thousand construction details organized by climate and house part