However, the change is effective only if the entire system is adapted. You can save as much as 30 percent in energy costs with a VAV System. In addition, VAV systems are economical to install and to operate. But the flow of the air into a particular part of a building is variable and being managed through these boxes.
Usually they are used in the big buildings to better facilitate the people. They are expensive in cost though. Basically, this VAV box is a metal sheet type of thing with dampers and controls. There is a thermostat inside the box, which monitors the temperature and then air flow is supplied accordingly.
The controller and the thermostat are inter-connected. Whereas, the controller is responsible of varying the temperature and the flow of the air according to the temperature outside. The input programs are set by the technical staff, so that the VAV system should not be overloaded. VAV is temperature based air distribution system air flow changes as per the temperature of the space however CAV is independent from the temperature of the space as it gives constant air flow to the space.
In VAV we use automatic dampers which control air flow as per fluctuating loads of space. For example, a zone can be either a single room or a cluster of rooms all sharing the same heat gain, and heat loss characteristics.
The compressor regulates the refrigerant flow to maintain a constant air temperature. This is a result of improvements in the terminal unit. Products By Bayt. Use Our Mobile App. Automation And Energy Solutions. Vav and Cav Applications VAV Variable Air Volume terminal units are the units that provide temperature control by changing the amount of conditioned air sent to laboratories according to the signal it will receive from the thermostat or automation system. They are used in air conditioning and ventilation systems to provide the desired fresh air to the spaces, to transmit or exhaust air at a constant flow rate.
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