What is a window that is hinged on one side called?

A window that is hinged on one side is referred to as a casement window. This design allows the window to open outward, similar to how a door swings open. The unique construction provides several benefits, such as improved ventilation; when opened, the angle can catch breezes and funnel them into the room. Additionally, casement windows typically offer excellent sealing when closed, enhancing energy efficiency by preventing air leaks.

Other types of windows mentioned do not share this characteristic. Sliding windows, for instance, open horizontally rather than swinging open from a hinge. Double-hung windows feature two vertically movable sashes that slide up and down and are distinct from the single-hinge design of casement windows. Bay windows, on the other hand, are a configuration of multiple windows that extends outward from the main walls and are typically not hinged like a casement. Understanding the specific mechanisms and designs of these windows helps distinguish them and appreciate their functional differences.