Insulating Attic Heating Ducts

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

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. Check the speed of the blower motor on the furnace. Duct liner isn t generally a diy installation and if your ducts already have liner you don t need to insulate the exterior. 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.

Use metal flex or fiber board ducts that are insulated to code. If necessary switch the wires to reduce the blower to its lowest speed. Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords. In this video this old house plumbing and heating expert richard trethewey helps a homeowner insulate his ductwork.

Duct board much like the duct liner is also a fiberglass product. 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. Typical ducts install between a plenum or large supply duct and. The duct insulation should include a vapor barrier cover.

A well maintained attic can help you save up to 50 percent on your energy bills. Read this before you start thinking about adding insulation to your attic. 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. 911 attic insulation services 911 attic insulation helps keep your attic clean sanitary and properly insulated and vented.

When insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value. According to the u s. Don t use standard cloth duct tape on hvac ductwork since the adhesive won t hold up to extreme temperatures. Insulating exposed heating ducts in attics basements and under subfloors can improve the energy efficiency of a heating system.

After all most new homes have r 49 insulation on the attic floor holladay continues. 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. Get free shipping on qualified insulation or buy online pick up in store today in the heating venting cooling department. For an added layer of protection you can apply duct mastic to the tape and duct.

Proper insulation is a great place to start but it may not be enough to fully protect your home. So logically the ducts deserve more not less insulation.