Benefits: Save on Monthly Utility Bills

In Cold Climates

Efficient windows save you money on monthly utility bills by trapping more heat inside a house and by keeping window surfaces warm and dry. Inefficient windows allow heat to escape, forcing heating systems to work for longer and pushing heating costs higher. They also create cold-air drafts inside a house, and condensation on window panes and frames. That can lead to health problems from mold and mildew and could slowly damage frames made of wood or metal. Replacing inefficient windows with efficient windows lowers heating costs by at least 15 percent. When used in new homes, the monthly savings typically exceed 24 percent:

In Hot Climates

Efficient windows save money by blocking exterior heat and reducing reliance on cooling systems. Technological advances in recent years allow windows to block heat without also blocking natural light from entering a house. Manufacturers use a coating applied to window panes, and these are often called “low-e windows”. Replacing inefficient windows with efficient windows lowers cooling costs by at least 11 percent to 37 percent. When used in new homes, the monthly savings typically exceeds 12 percent: