What Is a Vav Rooftop Unit
Rooftop Variable-Air-Volume (Vav) Systems Are Used to Provide Comfort in a Wide Range of Building Types and Climates. This System Consists of a Packaged...
Rooftop variable-air-volume (VAV) systems are used to provide comfort in a wide range of building types and climates. This system consists of a packaged rooftop air conditioner that serves several individually-controlled zones. Each zone has a VAV terminal unit that is controlled by a temperature sensor in the zone.
What is a VAV and how does it work?
The VAV regulates the volume of the air to the zone by opening or closing the damper, thus controlling the amount of conditioned air directed to the zone. Each zone in a building has a thermostat that controls the VAV, telling it when to open or shut the damper based upon the needs of the zone.
How does a VAV RTU work?
Similar to a single zone system, a VAV RTU system has supply air distribution ductwork, and air distribution in the space. Instead of a motor starter, a variable speed drive has been added to the supply air fan. Instead of one space sensor there are multiple space temperature sensors serving multiple zones.
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