Which type of window features upper and lower sashes that slide vertically in tracks?

Prepare for the Seabee BU A‑School Building Basics Test. Boost your skills with flashcards and multiple-choice questions, with hints and explanations provided. Gear up for success on your exam!

The type of window that features upper and lower sashes that slide vertically in tracks is the double hung window. This design allows for both the upper and lower sashes to be opened, providing versatile ventilation options. In a double hung window, the sashes are typically set into the frame and can move independently, enabling you to adjust airflow easily by opening the top or bottom sash as needed.

This distinct functionality sets double hung windows apart from other types. For instance, single hung windows only allow the lower sash to move while the upper sash remains fixed. Horizontal sliding windows operate by sliding left or right rather than vertically, and fixed windows do not open at all, serving primarily as a source of light. Thus, the double hung window offers maximum flexibility and is well-suited for various ventilation needs in a building.

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