Ductwork In Attic Or Crawlspace

If the ducting is not sealed well and insulated you will have plenty of problems because of the high attic temperatures.

Ductwork in attic or crawlspace.

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. You can get the air handler and ducts into conditioned space in several ways without needing a basement or crawl space. This means that like an attic or unfinished basement you don t heat and cool it.

The majority of ducts are installed in unconditioned attic spaces and crawl spaces where they are out of sight. Ductwork can eat into living space so innovative space saving features like squeeze elbows are in demand. If there is a dirt or gravel floor put down a vapor barrier then seal it off with concrete slurry. How to insulate furnace ductwork in a crawlspace 1.

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. The accessibility of a home s ductwork is a key factor in estimating the cost to replace it. Seal supply boxes with mastic. Iii special trusses that create space below the unconditioned attic.

I lowered soffits around room perimeters. Installing ductwork in the crawl space beneath a home limits movement and poses a lighting challenge. Cut the insulation with the utility knife in sections 2 inches larger than the circumference of the duct. There can be moisture issues in the crawlspace but i would deal with that before choosing to put the ducting in the attic.

Think about it condensation on ductwork probably isn t a big problem in phoenix arizona but why. Iv conditioned attic and more. Ductwork located in an attic crawl space may be difficult to get to and creates a hot and potentially hazardous environment for the crew. The crawl space is an unconditioned space.

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. If the ducts are in an unconditioned crawl space you can encapsulate. Ceiling diffusers can help route vents to alternative locations avoiding lengths of ductwork. In the winter a crawl space can be significantly colder than the living spaces of your home.

Knowing the disadvantages of attic install and the crawl space install. Measure the circumference of the ducts running through your crawlspace. Ii lowered ceilings in hallways. If the ducts are in an unconditioned attic you can put spray foam insulation on the roof deck.

Finding space for ductwork in the. I vote for the attic.