I’m in the process of building my own home. I’ve used ICFs for the basement and first floor, 2×6’s for the upstairs. I’m at the point where I am looking at HVAC contractors. I’ve already had Energywise Structures do my heatloss and duct size requirements, etc. which I am showing to the contractors.
The one I want to use for the job was asking how to channel away the ICF foam to install duct work. I don’t know anything about HVAC, but I am pretty sure you should avoid putting ducts on exterior walls. And I don’t like the idea of cutting away 2.5″ of foam on the walls.
I have one space where my living room, dining room and kitchen are essentially all in 1 room (clearspan). What are my options for heat and cold air ducts in this space, and in general with my ICF walls?
Replies
Just a few observations with HVAC quickest, cheapest methods.
Ducts in outer walls lose heat and in summer gain heat. You cannot insulate these ducts to the same level as the wall around. (As done by dummys at my house)
All duct work should be insulated, even ducts inside the heated/cooled areas. So called insulated ducts ran in the attic will cause ice dams. (As done by dummys at a customers house)
Cooled non-insulated ducts often "sweat" from condensation and stain the ceiling from drips. (As happened in another customers house in the basement)
If you can use the ducts for cooling only. In floor radiant heat is by far the best for heating!
MatD
2.5" is only just enough room for a 2" plumbing drain. Ductwork? It pretty well has to go in an inside wall or in a chase.
Are there no inside walls at all? If there is one, can it be made thick enough to run some tubing, like 6" or so?
Ron
I can have him run ducts on interior walls on most of the house, but the large open space will be a problem. I suppose I should plan to frame out a chase for this area?
Hi Matd, and other posters,
My husband and I are working on ductwork for our own ICF home. Anyone have some advice? Or is willing to talk to us about our questions?
Thank you very much,
Jordan