• window performance
    grade calculator

    To enable customers, fenestration product manufacturers and their stakeholders, as well as consumers, to select products that conform with the Canadian National Building Code and Provincial / Territorial / Municipal Building Codes, ENERGI has designed a Window Performance Grade Calculator.

    This handy tool will allow you to establish the required performance grades for a specific building (based on terrain conditions, building height & shape) by using the existing climatic design values of more than 640 selected Canadian locations included in the 2010 National Building Code.

    Combination configurations & sizes are reviewed and provide Performance Grade data based on the mullion reinforcement design.

    Registration Login

    Canada Actually available
    for Canada only.

    iPad version
    Also available

    The calculator helps determine appropriate air tightness levels, water penetration
    resistance and positive / negative design pressure. The results can be registered,
    classified and emailed.