U Factor For Garage Doors

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.

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. Keep in mind that insulated glass units are ineffective if the frame leaks air. U factor represents the flow of heat through a material meaning the lower the u factor the better.

What is garage door r value. 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 and air infiltration results for clopay commercial sectional doors. Fire doors are usually rated for 20 or 90 minutes.

What is the standard r value for a garage door. U factor is the rate at which a window door or skylight conducts non solar heat flow. Therma tru offers a wide selection of fiberglass 20 minute fire rated doors for protection with a sense of style. For best u factor choose finish and color with high solar reflectance bright colors.

Below is a list of our garage doors and the r value of each one. With the equivalent energy performance criteria products can be considered certified with the following performance. 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. Or u factor of 0 29 if the shgc is greater than or equal to 0 37.

U factor will vary between 0 66 and 1 00 depending on finish and color selection. Or u factor of 0 30 if the shgc is greater than or equal to 0 42. The u factor shgc and vt factors vary and are determined by the type of glass you specify. 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.

Now that you understand why u factor is a better energy performance indicator lets discuss the details of it. It s usually expressed in units of btu hr ft2 of. For windows skylights and glass doors a u factor may refer to just the glass or glazing alone. A high garage door u factor means that your garage door transfers heat easily.