Ductwork Installation In Attic

Adding heat runs in a basement may change the airflow in the ductwork going to other rooms.

Ductwork installation in 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. Joints 1 are attached and the ducting is connected to vents and your hvac system. I have my duct work in the crawlspace of my home its about a 4ft crawl. One of the most common mistakes when installing attic ductwork is choosing.

From furnace installed anywhere in a house or in attic. Burying ducts in attic insulation. 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.

Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords. Expect to pay 35 55 per linear foot including labor and materials. Heaping insulation over the ducts is fine in dry climates but can cause condensation on the duct insulation jacket in humid climates. My home is 20 yrs old.

Here is my problem. Duct board much like the duct liner is also a fiberglass product. Choose properly sized ducts. Contractors will plan the lines of ductwork needed according to your lighting then cut the ducting to fit the planned lengths.

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. 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. Should i have the ducts lowered away from joist a few inches.

This is an especially relevant tip for flex ducts more on that in a. How to properly install ductwork in an attic tip 1. By spraying closed cell foam on the ducts before burying them in attic insulation you prevent the condensation problem. From air handler installed in a house or in attic.

Install dampers at the registers to adjust airflow. Duct liner isn t generally a diy installation and if your ducts already have liner you don t need to insulate the exterior. Each register should have its own damper that can be accessed for adjustment. The doe s building america program recommends beds buried encapsulated ducts.

Give your ducts the proper support.