A hopper window is a single style window similar to a casement window in that they both are hinged for opening, rather than slide open. It is hinged on the bottom and opens inward from the top. Though these windows can come in a variety of sizes, they are a common style used in small areas and openings, such as basements and bathrooms.
What makes the hopper window versatile for small spaces is the fact that they open completely. A smaller window occupies a limited amount of space already and those that slide open only allow half the area of the window to be used for ventilation. A hopper window, because the entire window opens from the top, allows ventilation through the entire surface area of the window. It is, therefore, commonly found in basements and in bathrooms where there is a window in the shower or tub area. Though less common, they are sometimes used above other, larger style windows.
The hopper window features a hinged bottom and a locking mechanism at the top. There is a small, lever-style handle that is used to open and shut the window that also fits into the locking mechanism for security. Depending on the size of the window, security features are important because of the fact that the window is often at or close to ground level, making them easily accessible for intruders.
Replacement hopper windows are readily available from both dealers and home improvement stores. The window is considered to be very energy efficient and provides maximum function compared to other models designed for small openings. One of its disadvantages is limited privacy. Window coverings such as blinds or curtains make the normal operation of a hopper window cumbersome, if not impossible. Alternatives to window coverings for a this style are privacy films and tinting.
The hopper window accommodates a full window screen because the window opens inward, away from the screen. Casements include wood and vinyl, making them both decorative and practical for most all installations.