Ductwork Insulation R Value

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Ductwork insulation r value.

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. 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. A material with a higher r value is a better insulator. 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.

Looking at the cooling load only the additional load would be. Ducting values are determined by two factors. 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.

Thermal resistance r value definition. Higher compression levels do the opposite of higher r values.