Upgrading to energy-efficient windows can reduce your heating and cooling costs by 15%-30%, depending on factors such as your home's location, window type, and insulation quality. Energy-efficient windows, especially double-pane or triple-pane models with low-E coatings, provide better insulation and minimize air leaks, helping maintain a consistent temperature in your home. While the initial investment can be significant, many homeowners find they recoup the cost within 10 to 15 years through energy savings. Additionally, new windows offer benefits beyond energy savings, including improved comfort, reduced noise, and increased home value.