When shopping for replacement windows and patio doors, choose Energy Star certified windows and patio doors.
The Energy Star program was developed by the U.S Department of Energy and the U.S Environmental Protection Agency to help identify energy-efficient choices for your home. The Energy Star seal is only granted to products that demonstrate significant reduction in energy consumption in the home. All windows and patio doors installed by ONSTAR Windows and Doors meet or exceed Canadian regulations to be considered Energy Star compliant.