HAAG Certified Reviewer

Which of the following is a common feature of double hung windows?

1. Fixed top pane

2. Operable top and bottom sashes

3. Single sliding panel

4. Picture frame design

The correct answer is: Operable top and bottom sashes

Double hung windows are characterized by their operable design, allowing both the top and bottom sashes to move vertically. This feature provides flexibility in ventilation, as either sash can be opened independently or even simultaneously. The ability to operate both sashes enhances airflow control within a room, making double hung windows particularly popular in residential applications. In contrast, a fixed top pane does not allow for any movement, while a single sliding panel refers to a different style of window that slides open rather than having both sashes capable of independent operation. Lastly, a picture frame design is typically associated with fixed windows that do not open at all, further distinguishing it from the functional design of double hung windows.