Forced Air Furnace Duct Insulation

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Forced air furnace duct insulation.

R 6 value meets or exceeds most energy codes and helps reduce energy costs. This article describes heating and air conditioning ducts that have been placed in or beneath concrete floor slabs. Hvac air ducts located inside concrete slab floors invite a surprisingly broad range of building problems that fall into two broad categories. Wraps around new or existing ductwork.

If you have insulated air ducts and the insulation gets wet or moldy it cannot be effectively cleaned and should be removed and replaced. How often do you think you get the full labeled r value. Also make sure to use hvac tape and seal all of the joints between duct segments. R 6 duct insulation 6 305 btu hour 0 53 ton r 4 2 duct insulation 7 948 btu hour 0 66 ton the numbers are even higher for the additional heating load.

Secure the fiberglass insulation in place around the boot with. Press a continuous strip of foil tape to all longitudinal seams along straight runs of duct. No air should be able to penetrate the ductwork and the joints are a natural weak point. The second problem that needs to be addressed it the natural moisture in the air.

Use a paintbrush to apply duct mastic to the joints where an elbow. Functional troubles such as lack of air flow or collapsed ductwork and environmental problems such as. Insulating hvac ductwork when insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value. Ducts are infested with vermin e g.

Check the speed of the blower motor on the furnace. Find hvac duct fittings at lowe s today. Of duct surface measures 2 ft. Use this master flow 60 sq.

Use the type of metallic foil duct tape recommended by the insulation manufacturer to seal and hold the insulation in place. The duct insulation r values i mentioned above are what s on the product label. Moisture in the air wrap your ductwork. If the conditions causing the mold growth in the first place are not corrected mold growth will recur.

Some other factors to consider. Make sure the foil surface of the insulation is free of dust before applying the tape. If necessary switch the wires to reduce the blower to its lowest. The insulation you use to wrap your ducts should leave no gaps and be at least two inches thick to work effectively at reducing or eliminating condensation on ductwork.

Covers up to 60 sq.