Insulated Steel Door U Factor

Factor the more effective the insulation of the material.
Insulated steel door u factor. U value has an inverse relationship to r value. Other features may include screens with self. The lower the u value the better the insulating ability. B18 series steel stiffeners u factor 0 50 r value 2 01.
Wooden storm doors require more maintenance than the other types. Energy star qualification chart pulse fiberglass steel doors. Storm door frames are usually made of aluminum steel fiberglass or wood painted or not. We have several door styles to meet your insulated door needs for both residential and commercial applications.
High quality storm doors use low emissivity low e glass or glazing. Overhead door corporation uses a calculated door section r value for our insulated doors. All doors are tested in accordance with astm c1363 and sdi 113. Assemblies with higher r values insulate more heat than those with lower values.
A number which describes in specific terms the ability of a material or assembly to insulate heat. 1 u value r value. Metal framed storm doors might have foam insulation inside their frames. U factor the total or overall transmission of heat through a combination of materials assembly measured in btu s per hour per square foot of area for a difference in temperature of 1 f between the air on one side to the air on the other side.