Ducts In Attic Or Crawl Space

Insulate and air seal the floor with open cell foam put ductwork and mechanicals in the attic install a radiant barrier and mastic seal the ducts.

Ducts in attic or crawl space.

In addition to understanding the fundamentals of psychrometrics dewitt pointed out that hvac contractors. You can get the air handler and ducts into conditioned space in several ways without needing a basement or crawl space. Iv conditioned attic and more. Seal supply boxes with mastic.

I vote for the attic. See the article i linked to for more details. The crawl space is an unconditioned space. In the winter a crawl space can be significantly colder than the living spaces of your home.

Strap ducts out of insulation with 3 ductstraps per specifications. Now your sealed and insulated attic and your hvac duct system is protected from extreme temperatures like your crawlspace or basement. If the ducts are in an unconditioned crawl space you can encapsulate. And you win big time.

Iii special trusses that create space below the unconditioned attic. If the ducts are in an unconditioned attic you can put spray foam insulation on the roof deck. If you have ductwork in your crawl space the temperature of the duct will be the same as the temperature of the crawl space. Leaks from air conditioning condensate probably are not the worst moisture problem in a.

While the attic install isn t ideal it beats the problems that come with ducts. Ii lowered ceilings in hallways. This means that like an attic or unfinished basement you don t heat and cool it. I lowered soffits around room perimeters.

As don peek says in the comments below it may be more cost effective in existing homes to seal and insulate the ducts as well as you can. Knowing the disadvantages of attic install and the crawl space install.