North Star doors have been designed and built to withstand extreme weather conditions – not to mention looking attractive and saving energy while doing it. Performance testing by impartial, independent agencies has shown our products meet and exceed industry-accepted standards of excellence. North Star patio doors are one of the first on the market to receive CSA certification.

All North Star patio doors feature:

• AAMA-certified 5 5/8" multi-chambered insulating vinyl profiles provide maximum energy-efficiency.
• Strong interlocking meeting rails for air tightness.
• Full-perimeter double Ultrafab® weather-strip and bubble weather-strip provide an effective seal between the door jamb and the operating panels.

CSA-A440 rates the performance of doors for airtightness, watertightness, wind resistance, condensation resistance, resistance to forced entry, ease of operation and energy rating. When comparing performance, a higher number represents better performance. For example, A3 is better than A1 for air tightness. Energy rating measures the effect a door will have on annual heating costs – the higher the ER number the more energy efficient. A rating of +31 is substantially better than +16.

* Canadian ER-Energy rating with Low-e glass.
**Canadian ER-Energy rating with Low E glass and argon gas.

In addition, North Star patio doors are AAMA tested to an overall rating of LC45 (Light Commercial) and NFRC tested to U.S. energy rating standards.

Visit our Patio Door Gallery to see just some of the doors we sell.