Accessibility of Operable Windows: NAFS operating force limitations

January 9, 2026

Accessibility and barrier-free design notwithstanding, the North American Fenestration Standard (NAFS), referenced in the 2020 National Building Code of Canada (NBC), sets different operating force limits for standard CW and AW Performance Class windows. There are inherent differences between window types.

NAFS operating source requirements for standard non-accessible windows. — *NAFS* operating source requirements for standard (non-accessible) windows.

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Accessibility of Operable Windows: NAFS operating force limitations

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Accessibility of Operable Windows: NAFS operating force limitations

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Related Products & Services

High Security/High Speed Spiral® Rigid Rolling Door

PredaDoor® NXT® High-Speed Door

Turbo-Seal® Insulated Energy-Efficient Door

JELD-WEN® JWC8500 SERIES WINDOW

Read the Latest Issue