How To Insulate Hvac Ducts In Attic

Press a continuous strip of foil tape to all longitudinal seams along straight runs of duct.

How to insulate hvac ducts in attic.

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. Wrapping the duct in a foil faced blanket. You re throwing money out the window. 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.

That s what happened to the ducts in the lead photo of this article. Energy saver dealers 204 202 views. Purchase duct wrap insulation that complies with the 2009 international energy conservation code iecc standards that specify an r value of 8. 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.

Look for signs of air leaks at seams or joints such. Start saving money today. Use a paintbrush to apply duct mastic to the joints where an elbow connects to a duct. 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.

Use the type of metallic foil duct tape recommended by the insulation manufacturer to seal and hold the insulation in place. The two most common ways to insulate ductwork are. Applying spray foam insulation to the outside of the duct. Inspect the span of ductwork to be insulated.

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. How to insulate your central air heating ducts. If you need help deciding which type of insulation you need set up an energy consultation.

Invest in duct insulation today to safeguard your family s health and your pocketbook. 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. Duct liner isn t generally a diy installation and if your ducts already have liner you don t need to insulate the exterior.

Duct board much like the duct liner is also a fiberglass product. Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords. Bury the ducts deeply in insulation.