Single and Double Hung Windows
Double Hung windows have at least one moveable window element (or sash) that you can slide up or down to let some air into the room. Some windows let you tilt the sash as well for even more ventilation. They are perfect for small rooms, kitchens, offices, bedrooms, bathrooms, and extensions for picture windows.
Single hung windows only have one moveable sash. Double hung windows have two, and are more common and versatile. You can place them in any room to increase the overall architectural design of the building