You may not want to think about it, but winter will be here again before you know it. Of course, winter means it’s time to turn the heat back on, which can be a strain on your home energy budget. “Older windows are a common culprit of air leakage in the home, but today’s replacement options have insulating values that are moving closer and closer to the insulating value of a wall,” says Chris Pickering, vice president of marketing, Ply Gem Windows.