Duct Insulation In Attic

When hvac ducts are installed in a vented attic in any climate encapsulate the hvac ducts in attic insulation to protect them from temperature extremes in the unconditioned attic space.

Duct insulation in attic.

Attic space insufficient attic insulation poor air sealing and uninsulated ductwork are all common problems that will lead to uncomfortable rooms and make your home less efficient. Sometimes the insulation is inside the ductwork. Other times insulation may be on the outside. Most attic ducts are insulated flex ducts that is flex ducts with r 6 or r 8 fiberglass insulation along with an exterior polyethylene jacket.

Looking at the cooling side only the additional load would be. Because the moving air is in the ductwork for only a short period of time it does not need the insulation r value the attic floor requires. Use metal flex or fiber board ducts that are insulated to code. Flexible ductwork comes with different insulation r values.

The duct insulation should include a vapor barrier cover. All the ducts are in the attic. 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. Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords.

Air sealing your attic and ducts installing blown cellulose insulation and insulating ductwork will eliminate these problems. According to rightsuite the software we use the supply ducts have about 560 square feet of surface area and the return ducts 101 square feet.