*When you properly seal and insulate your home. Duck® brand weatherization products are a part of a complete home sealing and insulation solution. Energy savings is an estimate based on U.S. department of energy recommendations for improvements to a ‘typical’ U.S. existing house built between 1970 to 1989. Your actual savings may vary depending on individual factors, including how you seal and insulate your home, the size and age of your home, local energy costs, regional construction styles, and local climate.
Visit https://www.energystar.gov/campaign/seal_insulate/methodology for more information.