How To Insulate Hvac Ducts In Attic

Inspect the span of ductwork to be insulated.

How to insulate hvac ducts in attic.

Applying spray foam insulation to the outside of the duct. Wrapping the duct in a foil faced blanket. Use the type of metallic foil duct tape recommended by the insulation manufacturer to seal and hold the insulation in place. Start saving money today.

Duct liner isn t generally a diy installation and if your ducts already have liner you don t need to insulate the exterior. If you need help deciding which type of insulation you need set up an energy consultation. How to insulate the attic air sealing the attic energy saving attic insulation duration. Invest in duct insulation today to safeguard your family s health and your pocketbook.

Sometimes metal ducts are lined with duct liner a 1 inch thick fiberglass board that insulates the interior of the duct rather than the exterior. Energy saver dealers 204 202 views. How to insulate your central air heating ducts. The two most common ways to insulate ductwork are.

Use a paintbrush to apply duct mastic to the joints where an elbow connects to a duct. Bury the ducts deeply in insulation. Press a continuous strip of foil tape to all longitudinal seams along straight runs of duct. Insulating hvac ductwork when insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value.

Check the speed of the blower motor on the furnace. That s what happened to the ducts in the lead photo of this article. You re throwing money out the window. This isn t equivalent to bringing them into the conditioned space as you ll still have additional duct load but it s a lot better than having them in unconditioned attic space.

Make sure the foil surface of the insulation is free of dust before applying the tape. If necessary switch the wires to reduce the blower to its lowest speed. 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.

Duct board much like the duct liner is also a fiberglass product. Purchase duct wrap insulation that complies with the 2009 international energy conservation code iecc standards that specify an r value of 8. Look for signs of air leaks at seams or joints such.