What is the main purpose of a thermostat in an HVAC system?

The main purpose of a thermostat in an HVAC system is to regulate temperature by controlling the operation of heating and cooling equipment. A thermostat senses the current temperature of a space and compares it to the desired setpoint established by the user. When the temperature deviates from this setpoint, the thermostat sends signals to the HVAC system to either activate heating or cooling to bring the environment back to the desired comfort level. This feedback mechanism ensures that the living or working space remains at a consistent and comfortable temperature.

While monitoring humidity levels, improving air quality, and detecting airflow issues are important functions in an HVAC system, they are not the primary role of a thermostat. These functions typically involve other specific sensors and components within the system that complement the thermostat's function of temperature control. The thermostat's primary obligation remains focused on maintaining the desired indoor temperature, making it a critical component in ensuring both comfort and energy efficiency.