Do I Need the Highest Performance Level?

Just like energy efficiency, the window's overall performance is also essential to making the best decision.  

The following three factors must be considered when determining a window's strength and efficiency:

  • Wind resistance

  • Water tightness

  • Air tightness

To know the overall performance of a window, ask to see the North American Fenestration Standard (NAFS) results.  These results show the performance grade (PG) of a window.  This information is obtained during tests performed in accordance with the fenestration requirements imposed by the National Building Code.


Next Step

As members in good standing with Fenestration Canada, Kehl has full privileges to use the performance calculator.

Simply input your location and a set of standards will be produced for your area.

Kehl Windows and Doors   370 King St. W, P.O. Box 222   Harrow, Ontario  N0R 1G0
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© Kehl Window Systems Inc. 2018