Replacement Windows by Regal
When choosing replacement windows, the key objectives are to increase sunlight and decrease energy costs and drafts. According to the National Fenestration Rating Council; it’s all in the numbers. Learn what those numbers mean, so you can “clearly” choose the right replacements windows for your home.
U-Factor measures the amount of heat lost from the window. Most ratings will fall somewhere between a .20 to 1.20. Look for the lowest rating here to ensure optimal insulation.
Air Leakage is the measurement of air in cubic feet that is passing through the window. The lower the air leakage, the better the window. The target number is .3 or less.
Visible Transmittance is the measurement of light that comes through the window. The scale of measurement is 0 to 1. When shopping for replacement windows, look for a higher number.
Solar Heat Gain Coefficient is the measurement that gauges the amount of heat caused by sunlight that the window is able to block. The scale is from 0 to 1. The lower number the better for this scale.
Condensation Resistance measures a products ability to resist condensation. The scale is a number between 0 and 100. You will want to look for a higher number.