Ductwork Insulation R Value

Typically r 4 to r 8 is appropriate for the ducts within the insulated part of your home.

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. Looking at the cooling load only the additional load would be. Thermal resistance r value definition. 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.

A material with a higher r value is a better insulator. No insulation up to an r 4 value will work if you have any ducts in an uninsulated or unfinished basement. 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. 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.

There are no r value requirements for ductwork installed in other locations. One ton of air conditioning equals 12 000 btu hr so this would be almost half a ton 0 44 of cooling load.