How does a hopper window typically operate?

A hopper window operates by pivoting at the top, which allows the bottom of the window to swing inward. This design is characteristic of hopper windows, making them distinct from other window types. The inward operation provides several benefits, including effective ventilation while minimizing the risk of rain or debris entering the space. Additionally, this design is often used in basements or areas where external space is limited.

The unique pivot point at the top enables the window to open fully while still ensuring that the opening is not obstructive. This functionality is particularly advantageous in creating airflow and can also enhance safety, as the top pivot system allows for ventilation without allowing easy access from the outside.