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Variable air volume (VAV) is a heating and cooling strategy that adjusts the amount of air pumped into a space based on temperature and energy requirements. Systems range from simple on/off to sophisticated software-controlled options, with some allowing for efficient airflow to specific areas.
Variable air volume, or VAV, is a type of heating and cooling strategy that is used to regulate or vary the amount of air that is pumped into an enclosed space, based on factors such as ventilation or energy requirements to maintain the desired temperature within the space. There are several ways to manage variable air volume, with some systems being very simple and straightforward but with limited options, and more sophisticated systems which can be programmed to adjust the volume to suit a wide range of heating and cooling situations.
One of the simpler approaches to variable air volume is a system that simply turns itself off and on when the desired temperature is reached and maintained for a specified amount of time. With this approach, the speed of the air pumped through the space is more or less constant as long as the system is active. A thermostat measures the temperature and signals the air conditioning system to stop operating when the room is within the correct temperature range, then sends a second signal to start supplying air to the room when the temperature leaves the desired range .
Many of the air conditioning systems used in commercial spaces also allow you to easily regulate the volume of air that varies in terms of speed and temperature. Instead of simply shutting down when the desired temperature range is reached, systems of this type will reduce the amount of air flowing into the room when and as needed. This allows fresh air to continue to be pumped into the room while also allowing the temperature to stay within range for a longer period of time. A system that regulates variable air volume using this approach is often cost-effective, as the regulation is automatic and requires no manual intervention.
There are other systems today that offer additional controls and options for managing the variable air volume within a given space. With these options, the ventilation system can be configured with multiple entry and exit points, creating more efficient airflow to and from various points within the space. Many of these types of systems today are operated with the use of software technology, which allows you to alter the airflow from specific vents and adjust the temperature of the airflow to different points within the space. This can be especially important in a manufacturing environment, where the temperature near one area of the floor may need to be different from the temperature at the opposite end of the space, due to machinery or computer equipment placed within the area.
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