Environmental factors come into play when it comes to choosing the right replacement windows for Houston homes. The National Fenestration Council has a rating system that measures and compares the energy performance of windows. If youre in the process of choosing replacement windows in Houston and youre not sure what to ask your contractor, here are the numbers that you should look out for.
U-Factor indicates how fast a window assembly releases heat. The lower the U-Factor, the better the windows can help to insulate your home. Although the areas climate is usually warm, replacement windows in Houston are still recommended to have a low U-Factor in the event of cold winters. U-Factor rating is from .20 to 1.20.
2. Solar Heat Gain Coefficient
Solar Heat Gain Coefficient determines the amount of heat from the sun that the window is able to block. The measurement is from 0 to 1. Lower SHGC means less solar heat entering through a window. This is a particularly useful rating to take note of for replacement windows in Houston as can get really hot during the summers.