Window Settings

Openable

Fraction (%) of window area that is openable for natural ventilation. Typical fractions (%) of window areas include.

Window TypeSingle-pane windowDouble-pane window (half fixed, half openable)

Awning

90%

45%

Casement / tilt’n’turn

90%

45%

Double-hung

45%

22%

Louvre

90%

45%

Sliding

N/A

45%

All window types shown with safely restrictors

10%

10%

These percentages can vary depending on factors including building codes, rating tools, security, climate, and architectural design.

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