Have you ever thought about how old your windows and doors might be? If you can’t remember replacing them since you’ve bought your house, it might be time to think of replacing them. The U.S. Department of Energy recommends replacing old windows to lower energy costs and increase the energy efficiency of your home. Here are four ways why you should consider updating your home’s windows and doors: 1. They will save money: Investing now in new windows and doors will save money in the long run. A new exterior door, for example, will hold in heat during the winter…