Hopper Replacement Windows
Hopper Window Details
A hopper window is hinged at the bottom of the window rather than at the top, and open inward rather than outward. The screen on the hopper window is on the outside. Hoppers do not offer the same protection against rain as awnings do while open.
Windows with compression seals allow about half as much air leakage as double-hung and horizontal sliding windows with sliding seals. In other words, hinged windows generally have lower air leakage rates than sliding windows because the sash presses against the frame when closed.
Most often, hopper windows are used in small bathrooms and basements. They are also found above doors and other types of windows and are then referred to as transoms.