Ducts In Attic Or Crawl Space

I vote for the attic.

Ducts in attic 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. The crawl space is an unconditioned space. See the article i linked to for more details. Iii special trusses that create space below the unconditioned attic.

In the winter a crawl space can be significantly colder than the living spaces of your home. 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. Strap ducts out of insulation with 3 ductstraps per specifications. Ducts in your attic and crawl space can become disconnected due to rodent infestations flooding or just ordinary house settling.

Seal supply boxes with mastic. I lowered soffits around room perimeters. While the attic install isn t ideal it beats the problems that come with ducts. You can get the air handler and ducts into conditioned space in several ways without needing a basement or crawl space.

Ceiling diffusers can help route vents to alternative locations avoiding lengths of ductwork. And you win big time. If you have ductwork in your crawl space the temperature of the duct will be the same as the temperature of the crawl space. This means that like an attic or unfinished basement you don t heat and cool it.

Ductwork can eat into living space so innovative space saving features like squeeze elbows are in demand. Knowing the disadvantages of attic install and the crawl space install. 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. The hot air leaves your furnace at the desired temperature.

The majority of ducts are installed in unconditioned attic spaces and crawl spaces where they are out of sight.