What type of window is generally hinged on one side?

A casement window is designed to be hinged on one side, allowing it to swing open outward like a door. This design facilitates excellent ventilation because the window can catch breezes efficiently, depending on the direction of the wind. Additionally, casement windows are typically praised for their energy efficiency and ability to create a tight seal when closed, reducing drafts and improving insulation.

In contrast, sliding windows operate along a track and do not hinge, making them distinct from casement windows. Double-hung windows consist of two vertically sliding sashes and are also not hinged on one side. Awning windows, while they do hinge, are hinged at the top and open outward, differing from the side-hinged operation of casement windows. Therefore, the characteristics of a casement window clearly define its unique functionality among the options provided.