R Value For Attic Ductwork

R value measures how well certain building insulation materials can resist heat.

R value for attic ductwork.

The attic ductwork is flex duct work. 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 greater the insulation performance. Existing 3 4 inches of insulation.

Was your ductboard existing and you added a zoning system. 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. Here s how that 3 500 sf house would come out with those. For most applications a rating of r 6 or better will provide the best efficiency and long term cost effectiveness.

R value of insulated ducts flexible ductwork running in open space like an attic will be insulated from about r6 to r10. What i m talking about is a house with ducts in unconditioned space especially an unconditioned attic. Why attic insulation r value matters for california homeowners at this point you may be wondering why this r value matters so much especially when it s for an attic that you probably go into once a year to fetch your christmas decorations. Recommended insulation levels for retrofitting existing wood framed buildings.

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. 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. Add insulation to attic. 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.

There are no r value requirements for ductwork installed in an indirectly conditioned space. 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. R 6 and r 4 2 are common r values for ducts. It was new when the ac was put in 7 years ago.

Know exactly how much you need with our project calculators. Well your attic has a dramatic impact on the temperature throughout the rest of your home as well. If it was you don t have much recourse. When determining how much insulation you need don t guesstimate calculate.

However this is a cost that pays for itself quickly so choose higher r values when given an option. I called out the original hvac company and they took a look and said they saw no water. Our r value cognitive dissonance.