Variable air volume
An HVAC system that has a stable supply-air temperature, and varies the air flow rate to meet the temperature requirements. Compared to constant air volume systems, these systems conserve energy through lower fan speeds during times of lower temperature control demand. Most new commercial buildings have VAV systems. VAVs may be bypass type or pressure dependent. Pressure dependent type VAVs save energy while both types help in maintaining temperature of the zone that it feeds. Abbreviated VAV.
Related Links
The Case for High-Performance Variable-Air-Volume (VAV) Systems
VAV Units – Variable Air Volume Systems
Variable Air Volume Systems – Better Buildings Partnership
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