Duct Insulation In Attic

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.

Duct insulation in attic.

All the ducts are in the 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. 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. Other times insulation may be on the outside.

When these ducts are exposed to exterior air the plastic jacket never gets cold enough to permit condensation because the hot attic air keeps the plastic jacket warm. 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. 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. Sometimes the insulation is inside the ductwork.

Flexible ductwork comes with different insulation r values. Air sealing your attic and ducts installing blown cellulose insulation and insulating ductwork will eliminate these problems. Looking at the cooling side only the additional load would be. Use metal flex or fiber board ducts that are insulated to code.

R 8 duct insulation 5 227 btu hour. Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords.