The U.S. Department of Energy reports that 30 percent of a home's heat is lost through windows. The summer is no better; 76 percent of sunlight that hits windows leads to higher temps in your rooms.

Because covered windows improve heat retention, your furnace or heat pump doesn’t have to work as hard, lowering your heating bill in the process, says HVAC expert Tamer Sayed. You are likely to see a ...

Drafty, energy-inefficient windows aren't just a problem during the winter. They are just as big an issue in the summer, when cool air can escape through gaps and the sun's heat pours in through the ...