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36-in x 80-in x 4-9/16-in Steel Right-hand inswing Prehung Residential Insulating core Front Door

RELIABILT 36-in x 80-in x 4-9/16-in Steel Right-hand inswing Prehung Residential Insulating core Front Door

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What is the R value of the door's insulation?


The Energy Star qualification is also dependent on where your home is located in the Energy Star zones. The R-value is R-5 to R-6. The R-value is a measure of a material's resistance to heat flow. A higher R-value indicates greater insulating effectiveness. R-value is determined by the type, thickness, and density of the insulation. R-value quantifies how well a material prevents heat from transferring through it.

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