Window Settings

Openable

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

Window Type	Single-pane window	Double-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.