How To Insulate Hvac Ducts In Attic

Use the type of metallic foil duct tape recommended by the insulation manufacturer to seal and hold the insulation in place.

How to insulate hvac ducts in attic.

Check the speed of the blower motor on the furnace. Applying spray foam insulation to the outside of the duct. That s what happened to the ducts in the lead photo of this article. Insulating hvac ductwork when insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value.

Stop wasting money and energy with a leaking duct system. Press a continuous strip of foil tape to all longitudinal seams along straight runs of duct. 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. Use a paintbrush to apply duct mastic to the joints where an elbow connects to a duct. Bury the ducts deeply in insulation. The two most common ways to insulate ductwork are.

Duct board much like the duct liner is also a fiberglass product. When these ducts are exposed to exterior air the plastic jacket never gets cold enough to permit condensation because the hot attic air keeps the plastic jacket warm. Look for signs of air leaks at seams or joints such. 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.

If you need help deciding which type of insulation you need set up an energy consultation. How to insulate your central air heating ducts. Purchase duct wrap insulation that complies with the 2009 international energy conservation code iecc standards that specify an r value of 8. 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. Energy saver dealers 204 202 views. How to insulate the attic air sealing the attic energy saving attic insulation duration. Make sure the foil surface of the insulation is free of dust before applying the tape.

Invest in duct insulation today to safeguard your family s health and your pocketbook. Wrapping the duct in a foil faced blanket. You re throwing money out the window.