Casement window

By the start of the Victorian era, opening casements and frames were constructed from timber in their entirety.

They are sometimes opened with a crank, lever, or cam handle, which is placed around hand height or at the bottom and serves as a window lock.

In some countries architectural diagrams of casement windows show a dashed triangle with the hinged side identified by the point of the triangle (e.g. USA), while in others they point to the lever, showing a simplified perspective of the opened window (e.g. Hungary, Germany).

"[3] Casement windows are also excellent for natural ventilation strategies, especially in hot climates.

They can be hinged to open outward and angled in order to direct breezes into the building.