Ductwork Insulation R Value

Return ducts ductwork that brings expended air back to the hvac system to be filtered reconditioned and redistributed require insulation with an r value of 3 5 for exterior ducts and ducts in a ventilated attic or unvented attic above an insulated ceiling.

Ductwork insulation r value.

The united states department of energy defines thermal resistance also known as r value as the insulating material s resistance to conductive heat flow put more simply the r value measures the effectiveness of the insulation material. Typically r 4 to r 8 is appropriate for the ducts within the insulated part of your home. The mass of the insulation consisting of both its density and thickness and the compression ratio at installation which determines the final compressed density and effectiveness of the insulation. There are no r value requirements for ductwork installed in other locations.

Because it never gets very cold in florida you don t need duct insulation with as high an r value as you would if you lived up north. Higher compression levels do the opposite of higher r values. Consider these available items aes r 8 hvac duct wrap insulation reflective 2 sided foam core 4 x 50 200 sq ft 4 7 out of 5 stars 25 129 88 129 88 r 8 hvac duct wrap insulation reflective 2 sided foam core 4 x 25 100 sq ft 4 8 out of 5 stars 31. Thermal resistance r value definition.

One ton of air conditioning equals 12 000 btu hr so this would be almost half a ton 0 44 of cooling load. Ducting values are determined by two factors.