Windows and doors make up 41% of heat transfer in a home, no matter the time of year, and account for 45% of heating and cooling costs. Understanding how they lose, gain and maintain heat is essential ...

Replacement windows have energy-efficiency labels, just as you’ll find on home appliances like refrigerators and dryers. But these labels, created by the National Fenestration Rating Council (NFRC), ...

Without windows, a house wouldn't be a home — it'd be a very dark box. Windows bring the daylight in, add architectural detail and give us a view of the world around us — but how "green" are they? Can ...

Whether you’re buying windows for a new house or to replace some leaking clunkers past their prime, look beyond extravagant sales claims to a small label in the corner. It lists several ratings (on ...