How To Insulate Ac Ducts In Attic

Check the speed of the blower motor on the furnace.

How to insulate ac ducts in attic.

Bury the ducts deeply in insulation. Press a continuous strip of foil tape to all longitudinal seams along straight runs of duct. She is also still convinced that snow is blowing in through the soffits despite my evidence that is is not and in fact can t because there are. If necessary switch the wires to reduce the blower to its lowest speed.

Cover the spray foam with fire retardant spray. Purchase duct wrap insulation that complies with the 2009 international energy conservation code iecc standards. Then air seal and insulate the attic much better incidentally she also used 1200 gallons of propane last winter. Inspect the span of ductwork to be insulated.

Make sure the foil surface of the insulation is free of dust before applying the tape. If using this technique in a humid or marine climate the ducts must be encapsulated with spray foam before installing the blown insulation. The foam provides a vapor barrier so the ductwork won t sweat. Use a paintbrush to apply duct mastic to the joints where an elbow connects to a duct.

How to insulate your central air heating ducts 1. When insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value. Energy saver dealers 204 202 views. If you want to cover metal ductwork with blown in insulation t hese steps must be followed in this order.

Her response was the water will evaporate from the ducts by the time i need the ac on. That s what happened to the ducts in the lead photo of this article. Several manufacturers including certainteed and owens corning make fiberglass duct insulation with an integral jacket. You don t have to wash them but wiping them with a damp cloth or whisking them with a broom and making sure the surface is dry will help the sealant to duct bond.

After the inspection seal your ducts keeping a few tips in mind. Install loose fill insulation to cover the ducts and the attic floor to meet or exceed the code required r value for attic insulation. Start with clean dry ducts. Use the type of metallic foil duct tape recommended by the insulation manufacturer to seal and hold the insulation in place.

How to insulate the attic air sealing the attic energy saving attic insulation duration. Select your desired sealant or use a combination of products as appropriate. Cover the metal ductwork with closed cell spray foam. Owens corning duct insulation.

Add additional sealant if necessary.