This VAV box blog is the fourth in a series of posts that will explore how Veris Industries products can be used to monitor and regulate heating, ventilation, and air conditioning (HVAC) applications.
In general, a variable air volume (VAV) box regulates the flow of air to a specific room or zone in a building. It controls the flow of air through the use of dampers. Some VAV box designs include supplementary heating and / or cooling coils to act as mini air handlers. Thermostats control VAV boxes. Specifically, thermostats control zone temperatures by telling the VAV box when and how to adjust its dampers.
Though VAV boxes are widely used in commercial and industrial applications, with the advent of new energy efficiency standards for homes, they are now being installed in some residential applications.
The temperature sensor provides the input to control the damper to regulate how much hot or cold air is sent to a space. If it has a heating or cooling coil, the sensor will also control those points, as well. If the VAV box is fan powered, the temp sensor will control the fan speed and / or power based on demand.