What type of window is hinged to swing open?

A casement window is designed to be hinged at the side, allowing it to swing open outward or inward, depending on the design. This type of window provides excellent ventilation and unobstructed views when fully opened, making it very functional for areas where airflow is desired. The hinges allow for easy operation, and many casement windows can be opened and closed with a hand crank, providing additional convenience.

In contrast, a sliding window moves horizontally along a track and doesn’t swing open, while a double hung window features two vertically sliding sashes. A fixed window, as the name suggests, does not open at all, thus it cannot provide the ventilation that a casement window can. The design and functionality of a casement window make it the correct choice for this question.