What is U-factor for Windows
When it comes time to replace the windows in your home, there are a lot of things to think about, especially if you live in an older house. You want to install windows with maximum energy efficiency at the same time that you want to preserve the historical look of where you live. One of the most important things to think about and understand is what is U-factor for windows? Basically, U-factor is a way of measuring how well a window insulates. The better it insulates, the lower its u-factor rating will be. U-factor indicates the rate of heat loss from a window. Insulated glass will have low U-factor rates, because it keeps the cold out and the heat in or vise-versa depending on your climate and the season. A good U-factor rate to look for is .30, which is about as low as it gets.