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.

One ton of air conditioning equals 12 000 btu hr so this would be almost half a ton 0 44 of cooling load. A material with a higher r value is a better insulator. Higher compression levels do the opposite of higher r values. 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.

Thermal resistance r value definition. 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. 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. 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.

No insulation up to an r 4 value will work if you have any ducts in an uninsulated or unfinished basement. Ducting values are determined by two factors.