Consist of two sashes, one or both of which slide horizontally in the frame. They are the least energy-efficient of the window types listed here, and the most prone to air and water leaks.
Include one fixed sash (usually the top one) and one that moves up and down in the frame.
Include offset upper and lower sashes, which can both move up and down in the frame. Both the single and double- hung windows are not as energy-efficient as awning or casement windows, but their appearance may be more appropriate to the style of the house, especially in the case of older homes.
This is a non-operating window (stationary)
Is a window that has radius at the top and can also be a full circle.
Hinged at the top and opens out from the bottom. With an effective seal, this design minimizes air infiltration.
Hinged on one side and swings open like a door. This design provides the best seal and has the lowest air leakage for a window that opens.
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