R Value For Flex Duct In Attic

The duct insulation r values i mentioned above are what s on the product label.

R value for flex duct in attic.

I m looking at you mississippi and alabama r 6 and r 4 2 are common r values for ducts. R 6 duct insulation 6 305 btu hour 0 53 ton r 4 2 duct insulation 7 948 btu hour 0 66 ton. Some other factors to consider. R value measures how well certain building insulation materials can resist heat.

7 948 btu hour 0 66 ton the numbers are even higher for the additional heating load. A sprawling ranch might have more duct runs than a two story of the same number of square feet. Know exactly how much you need with our project calculators. It was new when the ac was put in 7 years ago.

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. 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. Like the title says and this is a 3rd floor apartment. How often do you think you get the full labeled r value.

I cannot condition the attic so the only things i can think of is to add insulation to the flex duct or i read somthing about increasing the fan speed to make the air flowing a little warmer. 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. Number of duct runs house size is a factor here but so is the layout of your home. I called out the original hvac company and they took a look and said they saw no water.

Recently i had another hvac company come out and put in a new bathroom vent and they told me they believed the duct work was full of water. Or you live in a state that doesn t require r 8 on ducts in attics. Both types of insulation are available in a variety of thicknesses and r ratings. 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.

For most applications a rating of r 6 or better will provide the best efficiency and long term cost effectiveness. The higher the r value the greater the insulation performance. 6 305 btu hour 0 53 ton r 4 2 duct insulation. Blanket duct wrap is applied separately from the actual ducting process whereas insulated flexible duct comes with the insulation already wrapped.

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. What can i do to prevent this. Here s how that 3 500 sf house would come out with those. R value of insulated ducts flexible ductwork running in open space like an attic will be insulated from about r6 to r10.