Insulating Ductwork In Attic

Frost king baseboard air deflector extends 15 to 25 in.

Insulating ductwork in attic.

The duct insulation should include a vapor barrier cover. 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. Once you ve decided which type is best for you examine the material options and prices to home in on the right product. Install loose fill insulation to cover the ducts and the attic floor to meet or exceed the code required r value for attic insulation.

Length ductwork insulation sleeve r 8 2 model f8ds10 19 13. The department of energy claims that the average us home loses hundreds of dollars a year in heating and cooling costs. Both can be added to uninsulated attics or layered over existing material. Dia x 5 ft.

Test total duct leakage. Repeat to insulate the remaining ducts. Loose fill or batt the common term for blanket 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.

Dia x 5 ft. Master flow 12 in. Mechanically fasten and mastic seal all duct connections. 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. Wrap the insulation around the duct and then pinch the seam closed. 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. Master flow 10 in.

Sometimes the insulation is inside the ductwork. Unfortunately so many houses especially newer homes end up with ductwork running through the attic. The greater the temperature extreme between the air inside the duct and the air surrounding the ductwork the greater your need for duct insulation. Although both the attic floor and the ductwork are insulated ted recognizes the situation isn t ideal.

69 model hd11 6 99. Close to 25 of the energy you use to heat and cool your home disappears through leaky ductwork. When insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value. Flexible ductwork comes with different insulation r values.

For diy attic insulation you ve got two choices. That has kept the ventilator working but ted surmises the high. Use the type of metallic foil duct tape recommended by the insulation manufacturer to seal and hold the insulation in place. Add additional sealant if necessary.

Secure the insulation with short strips of foil tape. To install preformed duct insulation start by disconnecting an elbow to expose the end of the duct. Proper duct insulation is a major key to ensuring your home s energy efficiency.