R Value For Attic Ductwork

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.

R value for attic ductwork.

It was new when the ac was put in 7 years ago. Our r value cognitive dissonance. I m in georgia iecc climate zone 3 where our current state code requires r 13 in exterior walls r 18 in attic kneewalls r 19 in floors and r 30 in ceilings. If it was you don t have much recourse.

When determining how much insulation you need don t guesstimate calculate. For most applications a rating of r 6 or better will provide the best efficiency and long term cost effectiveness. If the contractor added all new ductboard and your local code requires r 6 then you have some ground to stand on. The higher the r value the pricier the ducting.

Add insulation to attic. I called out the original hvac company and they took a look and said they saw no water. 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. Here s how that 3 500 sf house would come out with those.

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. Know exactly how much you need with our project calculators. Recommended insulation levels for retrofitting existing wood framed buildings. If we put ducts in unconditioned space they have to be insulated to either r 8 if they re in an unconditioned attic or r 6 in any other type of unconditioned space.

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. There are no r value requirements for ductwork installed in an indirectly conditioned space. However this is a cost that pays for itself quickly so choose higher r values when given an option. The higher the r value the greater the insulation performance.

R 6 and r 4 2 are common r values for ducts. Existing 3 4 inches of insulation. Not sure where you are at but here in florida the minimum r value for ducts installed in an attic or any unconditioned space is r 6. Well your attic has a dramatic impact on the temperature throughout the rest of your home as well.

The attic ductwork is flex duct work. R value measures how well certain building insulation materials can resist heat. Was your ductboard existing and you added a zoning system.