Main Ductork In Attic

With hundreds of square feet of ductwork surface area in the attic and a δt of 75 f the air coming out of the vents in your home will be significantly higher than 55 f.

Main ductork in attic.

The duct insulation should include a vapor barrier cover. Burying ducts in attic insulation. One side of the duct system blows air through the branch ducts while the other side pulls air in. Cut a piece of foil tape to length.

The answer is simple. If the ducts are going to be concealed all seams need to be taped or caulked. You shouldn t install ducts in a vented unconditioned attic. When hvac ducts are installed in a vented attic in a dry climate bury the ducts in attic insulation to protect them from temperature extremes in the unconditioned attic space.

Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords. Type of ductwork system the least expensive duct system is a radial system of flexible ducts in an attic running to ceiling grates. If ducts are located in a crawlspace underneath your house cover the soil to reduce moisture. If they are located in your attic be sure the area is properly insulated and any cracks or holes are sealed.

If you re used to putting ducts in the attic moving the ducts indoors probably won t be easy by martin holladay august 3 2018 a vented unconditioned attic is a terrible place to locate a furnace and ductwork. Yes when you bury ducts in attic insulation in a humid climate you increase the risk of water vapor condensation on the jacket of the duct insulation. The costliest are sheet metal ducts running in enclosed walls and ceilings. Attics are almost as cold as the outdoors during the winter and can be much hotter than the outdoors during the summer.

Throw duct leakage into the mix and the problems are even worse. Use metal flex or fiber board ducts that are insulated to code. As most gba readers know ducts belong inside a home s thermal envelope not in an environment that s cold in the winter. Here s bob s trick for taping a seam on a pipe that s installed close to the subfloor.

Ductwork running along an open ceiling in the basement of a one story home is also more affordable to replace. Peel off part of the backing. But in my last article i also showed you some preliminary results from a research study on buried ducts in a hot humid climate. Slide the backing up and over the pipe.

Leave backing on the tape on metal ductwork.