Insulating Ductwork In Attic

When insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value.

Insulating ductwork in attic. In a vented attic this can happen when the duct is in close proximity to conditioned space i e the ceiling and also thermally isolated from the hot attic beneath the ceiling insulation. Summer hasn t even arrived he notes in a post at gba s q a forum and when the temperature outside climbs to more than 95 f the temperature in the attic tops 120 f. To install preformed duct insulation start by disconnecting an elbow to expose the end of the duct. Length ductwork insulation sleeve r 8 2 model f8ds10 19 13.

Close to 25 of the energy you use to heat and cool your home disappears through leaky ductwork. Secure the insulation with short strips of foil tape. Flexible ductwork comes with different insulation r values. Master flow 12 in.

69 model hd11 6 99. The greater the temperature extreme between the air inside the duct and the air surrounding the ductwork the greater your need for duct insulation. Apply a long strip of foil tape along the seam in the insulation. Other times insulation may be on the outside.

Wrap the insulation around the duct and then pinch the seam closed. Once you ve decided which type is best for you examine the material options and prices to home in on the right product. In this case the temperature gradient between supply air and the ceiling can be such that the duct surface could be cooler than the local dew point. Add additional sealant if necessary.

Install loose fill insulation to cover the ducts and the attic floor to meet or exceed the code required r value for attic insulation. Dia x 5 ft. The department of energy claims that the average us home loses hundreds of dollars a year in heating and cooling costs. Test total duct leakage.

Dia x 5 ft. Sometimes the insulation is inside the ductwork. Frost king baseboard air deflector extends 15 to 25 in. Repeat to insulate the remaining ducts.

Use the type of metallic foil duct tape recommended by the insulation manufacturer to seal and hold the insulation in place. Loose fill or batt the common term for blanket insulation. For diy attic insulation you ve got two choices. Both can be added to uninsulated attics or layered over existing material.

Master flow 10 in. Although both the attic floor and the ductwork are insulated ted recognizes the situation isn t ideal. Proper duct insulation is a major key to ensuring your home s energy efficiency. Length ductwork insulation sleeve r 8.

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. The duct insulation should include a vapor barrier cover. Model f8ds12 23 07.