Stand or sit in front of your windows on a chilly day, or better still, hold a candle at the window. If you see the flame flicker and you feel a draft, that’s a sign that your windows are letting outside air come in, and the heated air inside your home is escaping. Replacing your old windows with better quality windows will be a smart decision. New replacement windows have improved thermal and insulating properties in the glass that eliminates drafts, keeping your home warmer in the winter and cooler in the summer.