ClimaTech PriME is a family of high-performance insulated glass packages. ENERGY STAR has recognized it as meeting the criteria for the Most Efficient designation on select Alside vinyl windows and patio doors. Now offered on Mezzo and Fairfield 80 Series windows, homeowners can significantly reduce their home’s energy consumption and lower their utility bills while potentially qualifying for valuable tax credits. ClimaTech PriME meets the energy-efficiency performance requirements for all four climate zones of the country.