Insulating Hvac Ducts In Attic

No building inspector worth his or her salt is going to let any builder or hvac contractor get away with installing ducts that aren t insulated.

Insulating hvac ducts in attic.

Make sure the foil surface of the insulation is free of dust before applying the tape. To install preformed duct insulation start by disconnecting an elbow to expose the end of the duct. Insulated ducts have been the standard for decades now. The greater the temperature extreme between the air inside the duct and the air surrounding the ductwork the greater your need for duct insulation.

R 8 duct insulation 5 227 btu hour. Unfortunately so many houses especially newer homes end up with ductwork running through the attic. First consider the duct location. 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 keeps air that s supposed to be cool cool and air that s supposed to be warm warm. Snap a plastic cap onto the duct end then slip the preformed insulation over the duct. In addition to making the unit hard to get to for service high attic heat can trigger the. Secure the insulation with short strips of foil tape.

How to insulate your central air heating ducts. Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords. All the ducts are in the attic. If your ducts aren t insulated you re probably paying way more than you should to cool and heat your home.

Apply a long strip of foil tape along the seam in the insulation. Use metal flex or fiber board ducts that are insulated to code. Use the type of metallic foil duct tape recommended by the insulation manufacturer to seal and hold the insulation in place. Inspect the span of ductwork to be insulated.

Insulating hvac ductwork when insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value. 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. Look for signs of air leaks at seams or joints such. 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.

Put it in an attic full of blown insulation and you re forcing it to work harder to vent its heat. Repeat to insulate the remaining ducts. The duct insulation should include a vapor barrier cover. Let s look for constantly improving methods through sharing.

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. Hvac ducts should be buried under insulation hard covered too. Looking at the cooling side only the additional load would be.