U Factor For Garage Doors

U factor though not used as often as r value u factor is another number you may see when shopping for a garage door.

U factor for garage 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. Nfrc u factor ratings however represent the entire window performance including frame and spacer material. U factor and air infiltration results for clopay commercial sectional doors. What is the standard r value for a garage door.

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 controlled space. U factor will vary between 0 66 and 1 00 depending on finish and color selection. For best u factor choose finish and color with high solar reflectance bright colors. The u factor shgc and vt factors vary and are determined by the type of glass you specify.

With the equivalent energy performance criteria products can be considered certified with the following performance. Or u factor of 0 30 if the shgc is greater than or equal to 0 42. Fire doors are usually rated for 20 or 90 minutes. Building codes standards such as those found in leed iecc and ansi ashrae ies standard 90 1 provide guidelines and standards for how sectional overhead doors should be made and how they.

U factor measures the rate of heat transfer and is appropriately applied to the thermal efficiency of windows which similar to insulated roll up garage doors are assemblies comprised of multiple components. What is garage door r value. Therma tru offers a wide selection of fiberglass 20 minute fire rated doors for protection with a sense of style. Now that you understand why u factor is a better energy performance indicator lets discuss the details of it.

Keep in mind that insulated glass units are ineffective if the frame leaks air. 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 the better. U factor represents the flow of heat through a material meaning the lower the u factor the better. For windows skylights and glass doors a u factor may refer to just the glass or glazing alone.

It s usually expressed in units of btu hr ft2 of. U factor of 0 28 if the shgc is greater than or equal to 0 32. The fire door rating measures how long a door can prevent the passage of flame from one side of the door assembly to the other. Below is a list of our garage doors and the r value of each one.