Which window design is usually hinged on the side and swings outward?

The correct answer is the casement window, which is characterized by its design that features hinges on the side, allowing it to swing outward. This type of window offers several benefits, including excellent ventilation and an unobstructed view when open, as it can be fully opened up to 90 degrees.

Casement windows are typically operated by a crank mechanism, making them easy to open even in hard-to-reach areas. They create a tight seal when closed, which improves energy efficiency and helps keep out the elements.

Understanding the distinct functionality of the casement window not only clarifies its advantages but also demonstrates the practicality of window designs in various applications.

In contrast, options like awning windows are hinged at the top and swing outward from the bottom, while picture windows are stationary and do not open. Double-hung windows feature two sashes that move vertically but do not swing outward at all.