What defines a double hung window?

A double hung window is characterized by having both the upper and lower sashes operable, allowing them to slide vertically up and down. This design offers several advantages, such as improved ventilation, as both sashes can be opened to create airflow. Homeowners appreciate this feature because it allows for flexibility in how the window is used, whether for cooling fresh air or for minimizing dust intrusion by adjusting the lower or upper sash.

The presence of two operable sashes is key to the functionality and versatility of double hung windows, making them a popular choice in residential architecture. The design encourages natural ventilation strategies, as opening both sashes can achieve better airflow compared to a single operable sash, enhancing energy efficiency within the home.