Tallento and the U.S. Department of Energy's (DOE) Weatherization Assistance Program (WAP) differs in many ways from what is commonly referred to as "weatherizing your home." The latter involves low-cost improvements, such as adding weatherstripping to doors and windows, to save energy. WAP takes the "whole house weatherization” approach that analyzes all of the building systems—the building envelope, heating and cooling systems, electrical system, and electric baseload appliances—through the completion of an energy audit,