Which ceiling type allows air and smoke to move between spaces?

Which ceiling type allows air and smoke to move between spaces?

• A. Open-Grid Ceilings
• B. Drop-Out Ceilings
• C. Pipe Sizing
• D. Test Connection

Answer: (A)

Air movement between spaces is determined by whether there is a continuous opening above the ceiling. Open-grid ceilings leave the plenum above the ceiling open, so air and smoke can flow freely from one space to another. That’s why this ceiling type allows air and smoke to move between spaces. In contrast, drop-out ceilings use ceiling tiles within a grid to create a barrier, which limits direct airflow between rooms. The other terms—pipe sizing and test connections—aren’t about ceiling construction or airflow between spaces.

Air movement between spaces is determined by whether there is a continuous opening above the ceiling. Open-grid ceilings leave the plenum above the ceiling open, so air and smoke can flow freely from one space to another. That’s why this ceiling type allows air and smoke to move between spaces. In contrast, drop-out ceilings use ceiling tiles within a grid to create a barrier, which limits direct airflow between rooms. The other terms—pipe sizing and test connections—aren’t about ceiling construction or airflow between spaces.