Double-hung windows provide great ventilation control.
They do not require electrical cooling systems and can be glazed with fiberglass or low-E glass. They are very simple to clean. You can open each sash individually or only the top sash. You do not need to climb ladders to reach the outer glass. In addition, the sash may be tilted inward for simpler cleaning.
Double hung windows are also simple to customize. Because of the variety of forms and colors available, they are an excellent choice for homes of many styles. When both sashes are open, cool air from the outdoors might enter your home. Warm air from within will exit through the top sash. Because double hung windows can accommodate window air conditioners, they can be installed anyplace in your home. You can also install screens to your windows to increase ventilation.