DOE: Characterization of Energy Savings and Thermal Comfort Improvements Derived from Using Interior Storm Windows

This report records the results of a field study conducted in a historic home in Seattle, Washington, to document the performance of interior storm window inserts. The energy use and thermal performance of the house were monitored before and after the installation of the inserts. Using the defined analysis approach, it was determined that the interior storm windows produced a 22% reduction in heating, ventilation, and air-conditioning energy use and reduced building envelope leakage by 8.6%. Learn more.