Insulating Attic Heating Ducts

But the air in the ducts is facing a delta t of maybe 100 f or 120 f a greater delta t.

Insulating attic heating ducts. Typical ducts install between a plenum or large supply duct and. For an added layer of protection you can apply duct mastic to the tape and duct. Insulating exposed heating ducts in attics basements and under subfloors can improve the energy efficiency of a heating system. In this video this old house plumbing and heating expert richard trethewey helps a homeowner insulate his ductwork.

According to the u s. The duct insulation should include a vapor barrier cover. Purchase duct wrap insulation that complies with the 2009 international energy conservation code iecc standards that specify an r value of 8 for attic ducts and 6 for ducts located anywhere else. Duct liner isn t generally a diy installation and if your ducts already have liner you don t need to insulate the exterior.

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. Check the speed of the blower motor on the furnace. Duct board much like the duct liner is also a fiberglass product. 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.

Don t use standard cloth duct tape on hvac ductwork since the adhesive won t hold up to extreme temperatures. 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. 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.

So logically the ducts deserve more not less insulation. After all most new homes have r 49 insulation on the attic floor holladay continues. Insulation duct accessories the home depot store finder. Press a continuous strip of foil tape to all longitudinal seams along straight runs of duct.

Read this before you start thinking about adding insulation to your attic. A well maintained attic can help you save up to 50 percent on your energy bills. Get free shipping on qualified insulation or buy online pick up in store today in the heating venting cooling department. 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. Use metal flex or fiber board ducts that are insulated to code.