All Total Home Performance Employees have been certified through the National Weatherization Training Center located at Baltimore City Community College. The course is designed to challenge weatherization workers to expand their understanding and knowledge of Weatherization. Topics include Aligning Pressure and Thermal Boundaries; Attic Insulation; Dense- Pack Sidewall Insulation; Mechanical Ventilation; Basement and Crawl Spaces; Windows and Doors; and other weatherization measures to reduce energy cost by improving energy efficiency.