This means that like an attic or unfinished basement you don t heat and cool it.
Ducts in attic or crawl space.
While the attic install isn t ideal it beats the problems that come with ducts.
Iii special trusses that create space below the unconditioned attic.
Ii lowered ceilings in hallways.
I lowered soffits around room perimeters.
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.
The majority of ducts are installed in unconditioned attic spaces and crawl spaces where they are out of sight.
I vote for the attic.
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.
The hot air leaves your furnace at the desired temperature.
Knowing the disadvantages of attic install and the crawl space install.
Now your sealed and insulated attic and your hvac duct system is protected from extreme temperatures like your crawlspace or basement.
If you have ductwork in your crawl space the temperature of the duct will be the same as the temperature of the crawl space.
Iv conditioned attic and more.
In the winter a crawl space can be significantly colder than the living spaces of your home.
And you win big time.
Ductwork can eat into living space so innovative space saving features like squeeze elbows are in demand.
The crawl space is an unconditioned space.
Seal supply boxes with mastic.
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.