What does a thermostat do in an HVAC system?

A thermostat plays a crucial role in an HVAC system by controlling the temperature within a specified range to ensure comfort and efficiency. It acts as a sensor and regulator, monitoring the current temperature of the environment and comparing it to the desired setpoint. When the temperature deviates from the setpoint, the thermostat sends signals to the heating or cooling equipment to either turn on or off, effectively maintaining the temperature at the desired level. This precise control is essential for energy efficiency, as it helps prevent the system from running unnecessarily and ensures that the indoor climate remains comfortable for occupants.

While measuring humidity levels, regulating air quality, and maintaining airflow are essential tasks within HVAC systems, they are typically handled by other components like humidistats for humidity control, air purifiers for air quality, and fans or ducts for airflow. The primary function of the thermostat is specifically to maintain the desired temperature.