Cost Savings Action
Free! $ During winter, shut the windows tight and use window film to improve insulation and protect against drafts. Keep the shades/blinds open during the day to let sunlight in; close them at night.
Free! $ During summer, keep windows and shades closed during the hottest parts of the day to keep the sun out and open at night to let the cool breezes in.
$ $ Caulk the windows to prevent air leaks
$ $ Replace with more energy-efficient windows