A double-hung window is a type of window that has two operable sashes that slide up and down. The two main operable parts of a double-hung window are the top sash and the bottom sash, both of which can be opened to provide ventilation. Warm air is able to escape out of the top sash, while cool air from the outside is able to flow through the lower sash opening to help provide increased comfort. Double-hung windows come with tilt sashes that allow the upper and lower sashes to tilt inward, making it easier to clean both the interior and exterior glass from inside the home.
In contrast, a single-hung window has a fixed top sash and an operable bottom sash that moves vertically. The bottom part of the window slides up and down, while the top part remains stationary. Single-hung windows provide ventilation through the bottom sash only.
The main difference between a single-hung and a double-hung window is how they operate. Double-hung windows allow for better air flow and ventilation due to the ability to open both sashes. Single-hung windows are generally more affordable than double-hung windows, but double-hung windows offer a higher level of ventilation and airflow.
