Displacement Has Its Place

Displacement Has Its Place

Displacement-ventilation systems introduce cool air into a space at low face velocities and let convection and stratification move warm contaminated air up to returns.

When designing a cooling system for a large open space with a high ceiling, such as an open-floor-plan office, auditorium, casino, restaurant, or theater, consider a displacement-ventilation (DV) system, in which cool supply air displaces warm room air at very low velocities. DV systems offer energy efficiency, indoor-air-quality (IAQ) benefits, and low maintenance costs compared with traditional mixed systems.

DV falls into one of the three main categories of air distribution d

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