How To Insulate Hvac Ducts In Attic

How to insulate your central air heating ducts.

How to insulate hvac ducts in attic.

Make sure the foil surface of the insulation is free of dust before applying the tape. Use a paintbrush to apply duct mastic to the joints where an elbow connects to a duct. Look for signs of air leaks at seams or joints such. How to insulate the attic air sealing the attic energy saving attic insulation duration.

If necessary switch the wires to reduce the blower to its lowest speed. Inspect the span of ductwork to be insulated. Most attic ducts are insulated flex ducts that is flex ducts with r 6 or r 8 fiberglass insulation along with an exterior polyethylene jacket. 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.

Stop wasting money and energy with a leaking duct system. Start saving money today. 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. Insulating hvac ductwork when insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value.

Energy saver dealers 204 202 views. Duct board much like the duct liner is also a fiberglass product. Applying spray foam insulation to the outside of the duct. The two most common ways to insulate ductwork are.

That s what happened to the ducts in the lead photo of this article. Duct liner isn t generally a diy installation and if your ducts already have liner you don t need to insulate the exterior. Wrapping the duct in a foil faced blanket. Purchase duct wrap insulation that complies with the 2009 international energy conservation code iecc standards that specify an r value of 8.

If you need help deciding which type of insulation you need set up an energy consultation. Use the type of metallic foil duct tape recommended by the insulation manufacturer to seal and hold the insulation in place. You re throwing money out the window. Press a continuous strip of foil tape to all longitudinal seams along straight runs of duct.

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. Invest in duct insulation today to safeguard your family s health and your pocketbook. Check the speed of the blower motor on the furnace.