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. 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 the winter a crawl space can be significantly colder than the living spaces of your home. Ceiling diffusers can help route vents to alternative locations avoiding lengths of ductwork.

Iii special trusses that create space below the unconditioned attic. Now your sealed and insulated attic and your hvac duct system is protected from extreme temperatures like your crawlspace or basement. Large gaps between duct sections provide an exit point for the heated and cooled air before it has a chance to reach the vents in your rooms. And you win big time.

I vote for the attic. Ductwork can eat into living space so innovative space saving features like squeeze elbows are in demand. Iv conditioned attic and more. Ducts in your attic and crawl space can become disconnected due to rodent infestations flooding or just ordinary house settling.

You can get the air handler and ducts into conditioned space in several ways without needing a basement or crawl space. That same ac system that could never cool your bedrooms now with a sealed and insulated attic is providing supply airflow temperatures on par with the same unit located under a house. See the article i linked to for more details. Knowing the disadvantages of attic install and the crawl space install.

The crawl space is an unconditioned space. I lowered soffits around room perimeters. Ii lowered ceilings in hallways. The majority of ducts are installed in unconditioned attic spaces and crawl spaces where they are out of sight.

Strap ducts out of insulation with 3 ductstraps per specifications.