Attic Duct Insulation R Value

N a all other ducts.

Attic duct insulation r value.

R 8 inside thermal envelope. 7 948 btu hour 0 66 ton the numbers are even higher for the additional heating load. Know exactly how much you need with our project calculators. 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.

R 6 supply in attic. Existing 3 4 inches of insulation. The duct insulation r values i mentioned above are what s on the product label. R 8 inside thermal envelope.

Add insulation to attic. 6 305 btu hour 0 53 ton r 4 2 duct insulation. How often do you think you get the full labeled r value. 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.

Crawl space wall r value r 10 continuous or r 13 cavity 15 continuous or r 19 cavity duct r value supply in attic. For most applications a rating of r 6 or better will provide the best efficiency and long term cost effectiveness. 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. 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.

R value measures how well certain building insulation materials can resist heat. R 10 at 2 ft. 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. The higher the r value the greater the insulation performance.

Some other factors to consider. Here s how that 3 500 sf house would come out with those. 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. With multiple layers of product and airspaces between each layer enhanced performance will be gained.

Table 1 shows effective r values for 8 inch round ducts at three attic insulation levels and three duct insulation levels r 4 2 r 6 and r 8. If you install 2 layers of a reflective insulation does the r value double. 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. 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.

R 6 and r 4 2 are common r values for ducts.