Insulated Steel Door U Factor

Energy star qualification chart pulse fiberglass steel doors.

Insulated steel door u factor.

Wooden storm doors require more maintenance than the other types. It s usually expressed in units of btu hr ft2 of. For example a building with material with an r value of r 11 converts to an u value of 0 09 1 r or 1 11 0 09. 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. Many building owners spend millions of dollars a year on energy bills and the trio e represents a chance for them to realize significant savings on a new or. 0 56 to 1 13 w m2k which is high compared to other doors but low compared to well insulated walls and attics with many inches of foam or mineral wool or other insulation material in their assemblies. A number which describes in specific terms the ability of a material or assembly to insulate heat.

The trio e door is steel stiffened for strength but has achieved an operable u factor of 0 36 which is better than most other steel stiffened doors currently available on the market today. B18 series steel stiffeners u factor 0 50 r value 2 01. Overhead door corporation uses a calculated door section r value for our insulated doors. 1 u value r value.

U factor is the rate at which a window door or skylight conducts non solar heat flow. Reference table for u values u value is the coefficient of transmission i e the transmission of heat through the materials which compose the building s envelope or outer shell. The lower the u value the better the insulating ability. 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.

All doors are tested in accordance with astm c1363 and sdi 113. Metal framed storm doors might have foam insulation inside their frames. U value has an inverse relationship to r value. Assemblies with higher r values insulate more heat than those with lower values.

For windows skylights and glass doors a u factor may refer to just the glass or glazing alone. Factor the more effective the insulation of the material. The insulation of the best doors is in the range of u 0 10 0 20 metric. High quality storm doors use low emissivity low e glass or glazing.

Hollow metal door series core frame test methodology astm c1363 operable astm c518 calculated astm c1363 sealed in place u factor r value u factor r value u factor r value trio e polyurethane steel stiffened tb 0 29 3 4 0 09 11 0 n a n a trio e polyurethane steel stiffened kerf 0 36 2 7 0 09 11 0 n a n a.