U Factor Garage Door

U factor will vary between 0 66 and 1 00 depending on finish and color selection.

U factor garage door.

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. Fully insulated frame technology is the key factor for eliminating air leakage when using this type of door to seal the building envelope or enclose any climate. What is the standard r value for a garage door. U factor solar heat gain coefficient shgc and visible light transmittance vlt are certified by the national fenestration rating council nfrc.

Nfrc u factor ratings however represent the entire window performance including frame and spacer material. It s usually expressed in units of btu hr ft2 of. For best u factor choose finish and color with high solar reflectance bright colors. Keep in mind that insulated glass units are ineffective if the frame leaks air.

Fabricated of 16 gauge flush galvanized steel exterior these 2 51 mm thick doors offer an r value of 7 35. U factor though not used as often as r value u factor is another number you may see when shopping for a garage door. Below is a list of our garage doors and the r value of each one. U factor and air infiltration results for clopay commercial sectional doors the thermal performance and energy efficiency of commercial sectional overhead garage doors has become an increasingly more important factor to consider when designing building and maintaining commercial or industrial spaces.

U factor represents the flow of heat through a material meaning the lower the u factor the better. By contrast u factor is a measure of thermal transmittance of heat flow. U value has an inverse relationship to r value. U factor is the rate at which a window door or skylight conducts non solar heat flow.

U factor units are btu hour x ft x f to determine thermal properties as applied to a garage door there are two methods for consideration. Manufacturer stipulates that these ratings conform to applicable nfrc procedures for determining whole product performance. Nfrc ratings are determined for a fixed set of environmental conditions and a specific product size. To keep your garage cool in summer or warm in winter you want a garage door with a u factor of 35 or less although the lower the u factor.

Insulated sectional steel doors the insulated sectional steel door model 418 is a high quality heavy duty door that provides protection against hot and cold environments. This involves the door section only and represents r value through the mean thickness of the section. The u factor shgc and vt factors vary and are determined by the type of glass you specify. For windows skylights and glass doors a u factor may refer to just the glass or glazing alone.