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The definition of HVAC control systems can range depending on whether it is applied to a very basic residential application or potentially to an extremely complex large-scale application, but in short, HVAC controls consist of devices that control the operations of Heating, Ventilation, and Air Conditioning equipment.
In residences, you’ll typically find a thermostat that is connected to some kind of self-contained A/C unit. By adjusting the temperature (or setpoint), you are controlling the functions of that self-contained unit. For example:
When you set your thermostat to 75 degrees in the summer, you are dictating that your A/C unit should run until your indoor temperature reaches 75 degrees, at which point, it should shut off.
In this simple example, your HVAC thermostat is considered an HVAC controller, however, it is also a sensor because it is sensing your indoor temperature. We’ll talk more about sensors as we delve deeper into more complex systems.
When it comes to applying HVAC control systems to larger facilities, the HVAC controls are sometimes a part of a larger system known as a building automation or energy management system.
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