Ducts In Attic Or Crawl Space

The hot air leaves your furnace at the desired temperature.

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. Ii lowered ceilings in hallways. This means that like an attic or unfinished basement you don t heat and cool it. Seal supply boxes with mastic.

See the article i linked to for more details. Knowing the disadvantages of attic install and the crawl space install. I vote for the attic. The crawl space is an unconditioned space.

If the ducts are in an unconditioned attic you can put spray foam insulation on the roof deck. Iv conditioned attic and more. Strap ducts out of insulation with 3 ductstraps per specifications. If you have ductwork in your crawl space the temperature of the duct will be the same as the temperature of the crawl space.

In addition to understanding the fundamentals of psychrometrics dewitt pointed out that hvac contractors. 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. You can get the air handler and ducts into conditioned space in several ways without needing a basement or crawl space. Sweating ducts in crawl spaces and attics getting mad.

In the winter a crawl space can be significantly colder than the living spaces of your home. Iii special trusses that create space below the unconditioned attic. While the attic install isn t ideal it beats the problems that come with ducts. If the ducts are in an unconditioned crawl space you can encapsulate.

Now your sealed and insulated attic and your hvac duct system is protected from extreme temperatures like your crawlspace or basement. Leaks from air conditioning condensate probably are not the worst moisture problem in a.