U Factor For Typical Vinyl Window

In these climates again heating costs can determine if a lower u factor could be beneficial and more energy efficient.

U factor for typical vinyl window.

High performance double pane windows can have u factors of 0 30 or lower while some triple pane windows can achieve u factors as low as 0 15. A window s u value also described as u factor measures the rate the window transfers non solar heat. U factor is the rate at which a window door or skylight conducts non solar heat flow. Even a standard window with double pane glass will vastly improve performance a standard clear insulated glass unit has a 49 u value.

U factor shgc frame type pg climate zones. U factor u value range between 20 to 1 20. In short it provides a measurable indication of the quality of insulation the window provides. A higher u factor allows heat to escape.

U factor shgc solar heat gain coefficient. Energy star provides recommended u factors for your climate. Most windows now carry this rating so it s becoming easy to make comparisons. Winguard premiervue spectraguard and eze breeze.

Additionally the window selection tool compares average simulated energy costs for your location based on various window types. Replace single pane windows with double pane windows a single pane window can have u values ranging from 9 to 98 basically they are the worst performing window. Nfrc u factor ratings however represent the entire window performance including frame and spacer material. Combination frames use different materials separately throughout the frame and sash to provide optimal performance.

Low u factors are most important in heating dominated climates although they are also beneficial in cooling dominated climates. The exterior surfaces of many wood windows are clad or covered with aluminum or vinyl to reduce maintenance. It s usually expressed in units of btu hr ft2 of. The lower the u factor the better the window is at keeping heat inside this is desirable in colder climates like the northeast.

Pgt builds custom aluminum vinyl and impact resistant house windows doors and porch enclosures. Generally speaking windows all have a u factor between 1 3 and 2 and the lower the number the better. This is desirable in very hot and sunny locations to avoid the greenhouse effect inside a home. For windows skylights and glass doors a u factor may refer to just the glass or glazing alone.

Shgc u factor tool. In mixed climates in the south and central regions that use both heating and cooling the u factor should be less than or equal to 0 35 for windows and less than or equal to 0 57 for skylights. The window u rating is reflected as a number between 0 20 and 1 20. Most homeowners choose to install thermal replacement windows because of the heat loss that occurs in the winter with their old windows.