As we previously discussed in one of our building technology basics videos, VAV (Variable Air Volume) controllers are integral to HVAC systems that require varying cooling and heating loads in different zones. In this article, we will explore some of the most common types of VAV boxes and their specific applications. Of course, there are many one-offs and iterations of these applications, but these are the ones you’ll see most frequently.
Continue reading Types of Variable Air Volume (VAV) BoxesTag Archives: VAV
What is a Variable Air Volume (VAV) Box?
George’s CBAS Tips, November 2019
Using CO2 sensors with VAV-B
We were recently asked if it would be possible to utilize CO2 sensors with the VAV-B in order to control CFM setpoints. At this particular site, they want to add CO2 sensors to some of the VAV-Bs and command the CFM setpoint to the MAX CFM when CO2 gets above 800 ppm. In the VAV-B manual, there is a scenario that explains how to do this when the CO2 sensor is directly attached to the VAV-B. It is located at the end of the manual in Appendix B.
But what if you don’t have any available inputs on the VAV-B and your CO2 sensor is located on a different controller? In this case, the logic to make this happen will have to come from CBAS.
George’s CBAS Tips, June 2018
Disabling Heat on a VAV for Summer
During the Summer, you might want to make sure that your heat is disabled on VAVs so that you don’t waste energy. This is especially true if you have electric heat strips as opposed to hot water coils, because you won’t have hot water when your boilers are off anyway. Continue reading George’s CBAS Tips, June 2018
AHU Supply Temp Sets the Stage
Typically, VAVs are equipped with a means of reheating the supply air provided by the corresponding AHU. Continue reading AHU Supply Temp Sets the Stage