Insulating Attic Heating Ducts

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Insulating attic heating ducts.

The duct insulation should include a vapor barrier cover. Use metal flex or fiber board ducts that are insulated to code. In this video this old house plumbing and heating expert richard trethewey helps a homeowner insulate his ductwork. Department of energy attic insulation improvements combined with air sealing and proper hvac maintenance can cut your heating and cooling energy use by 20 to 50.

Typical ducts install between a plenum or large supply duct and. Proper insulation is a great place to start but it may not be enough to fully protect your home. Insulation duct accessories the home depot store finder. Read this before you start thinking about adding insulation to your attic.

Check the speed of the blower motor on the furnace. But the air in the ducts is facing a delta t of maybe 100 f or 120 f a greater delta t. Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords. 911 attic insulation services 911 attic insulation helps keep your attic clean sanitary and properly insulated and vented.

Duct board much like the duct liner is also a fiberglass product. Don t use standard cloth duct tape on hvac ductwork since the adhesive won t hold up to extreme temperatures. Made from 1 to 2 inch thick sheets of rigid glass fiber and coated with an aluminum laminate for a moisture air barrier duct board comes in sections that fit together like metal ducts. According to the u s.

A well maintained attic can help you save up to 50 percent on your energy bills. Use the type of metallic foil duct tape recommended by the insulation manufacturer to seal and hold the insulation in place. For an added layer of protection you can apply duct mastic to the tape and duct. Duct liner isn t generally a diy installation and if your ducts already have liner you don t need to insulate the exterior.

Press a continuous strip of foil tape to all longitudinal seams along straight runs of duct. So logically the ducts deserve more not less insulation. When insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value. When the attic is 20 f that insulation is addressing a delta t of 50 f.

Insulating exposed heating ducts in attics basements and under subfloors can improve the energy efficiency of a heating system. 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.