Ductwork Installation In Attic

The doe s building america program recommends beds buried encapsulated ducts.

Ductwork installation in attic.

One of the most common mistakes when installing attic ductwork is choosing. Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords. Duct board much like the duct liner is also a fiberglass product. Each register should have its own damper that can be accessed for adjustment.

My home is 20 yrs old. Burying ducts in attic insulation. Joints 1 are attached and the ducting is connected to vents and your hvac system. Made from 1 to 2 inch thick sheets of rigid glass fiber and coated with an aluminum laminate for a moisture air barrier duct board comes in.

Ductwork installation will almost always take place in your attic. From furnace installed anywhere in a house or in attic. I have my duct work in the crawlspace of my home its about a 4ft crawl. By spraying closed cell foam on the ducts before burying them in attic insulation you prevent the condensation problem.

If those dampers can t be accessed from below you ll want to install them close enough to the register so that you can reach them through the register opening. 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. Duct liner isn t generally a diy installation and if your ducts already have liner you don t need to insulate the exterior. Give your ducts the proper support.

My floors have soaked the moister from the condensation of air vent that now it has rotten my joist where the vent touched them and subfloors are as well. Install dampers at the registers to adjust airflow. As most gba readers know ducts belong inside a home s thermal envelope not in an environment that s cold in the winter. Expect to pay 35 55 per linear foot including labor and materials.

You shouldn t install ducts in a vented unconditioned attic. House is very big and spacious and there are not enough walls for all heat runs and cold air returns. Heaping insulation over the ducts is fine in dry climates but can cause condensation on the duct insulation jacket in humid climates. There are several reasons for running ductwork in attic.

This is an especially relevant tip for flex ducts more on that in a. Should i have the ducts lowered away from joist a few inches. Choose properly sized ducts. How to properly install ductwork in an attic tip 1.

From air handler installed in a house or in attic.