Attic Duct Insulation R Value

R value of r 6 is required for exterior ductwork or ducts installed in a ventilated attic or an unvented attic above a vented ceiling.

Attic duct insulation r value. R value measures how well certain building insulation materials can resist heat. The higher the r value the greater the insulation performance. If you install 2 layers of a reflective insulation does the r value double. Microlite fsk duct wrap comes with an fsk foil scrim kraft facing designed to help ensure a closed system that prevents moisture drive and offers condensation control.

The duct insulation r values i mentioned above are what s on the product label. R 8 inside thermal envelope. Some other factors to consider. Add insulation to attic.

The effective r value of a buried duct installation depends on the size of the ducts the r value of the duct insulation and the depth of the loose fill insulation. Know exactly how much you need with our project calculators. 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. Crawl space wall r value r 10 continuous or r 13 cavity 15 continuous or r 19 cavity duct r value supply in attic.

Recommended insulation levels for retrofitting existing wood framed buildings. For contractors looking for r 12 duct warp microlite fsk formaldehyde free duct wrap is the only duct wrap on the market with an installed r value of r 12 in a single layer. R 10 at 2 ft. With multiple layers of product and airspaces between each layer enhanced performance will be gained.

7 948 btu hour 0 66 ton the numbers are even higher for the additional heating load. For most applications a rating of r 6 or better will provide the best efficiency and long term cost effectiveness. 6 305 btu hour 0 53 ton r 4 2 duct insulation. R 6 and r 4 2 are common r values for ducts.

R 8 inside thermal envelope. Purchasing the ducting and the insulation separately is often more cost effective and has a greater variety of options when it comes time to choose the r value of your insulation. Value r 10 continuous or r 13 cavity r15 continuous or r 19 cavity slab r value and depth ft r 10 at 2 ft. N a all other ducts.

When determining how much insulation you need don t guesstimate calculate. R value of 3 5 is required for buried ductwork and ducts installed in an unvented attic with roof insulation or in an unconditioned space including both ventilated and unventilated crawlspaces. R 6 supply in attic. Here s how that 3 500 sf house would come out with those.

If the product is simply doubled with no air space between the layers a very minimal benefit is obtained r 1 1 per layer for the reflective double bubble.