In a VAV system, what is the function of the VAV box damper, and how does it interact with a zone thermostat?

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Multiple Choice

In a VAV system, what is the function of the VAV box damper, and how does it interact with a zone thermostat?

In a VAV system, the VAV box damper is the primary control that determines how much conditioned supply air is delivered to a specific zone. The zone thermostat reads the room temperature and sends a cooling or heating demand. In response, the damper opens wider when cooling is needed to bring in more cool air, or closes somewhat when heating is needed to limit cooling air. If the system includes a reheat option, the amount of air through the box can be adjusted and then reheated as needed to reach the setpoint. The goal is to meet the zone’s load with the appropriate amount of supply air, rather than adjusting outdoor air percentage or return air.

In a VAV system, the VAV box damper is the primary control that determines how much conditioned supply air is delivered to a specific zone. The zone thermostat reads the room temperature and sends a cooling or heating demand. In response, the damper opens wider when cooling is needed to bring in more cool air, or closes somewhat when heating is needed to limit cooling air. If the system includes a reheat option, the amount of air through the box can be adjusted and then reheated as needed to reach the setpoint. The goal is to meet the zone’s load with the appropriate amount of supply air, rather than adjusting outdoor air percentage or return air.

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