What is the function of a thermostat in an HVAC system?

The function of a thermostat in an HVAC system is to control the cooling and heating process. It serves as the control mechanism that detects the current temperature and compares it with the desired set point. When the temperature deviates from the set point, the thermostat sends signals to the heating or cooling system to either turn on or off, ensuring the environment remains comfortable according to user preferences.

This active management of temperature helps maintain a stable climate within indoor spaces, leading to consistent comfort. The thermostat's role is crucial, as it enables an HVAC system to function efficiently by responding appropriately to real-time temperature changes, hence optimizing both performance and energy usage.

In contrast, increasing air temperature, regulating energy consumption, and filtering air quality involve different components and functions within an HVAC system. The thermostat does not inherently increase air temperature; rather, it controls when and how the heating or cooling systems operate. While it can contribute to regulating energy consumption by efficiently managing temperature settings, that is not its primary function. Additionally, filtering air quality is handled by air filters within the HVAC design, separate from what the thermostat is designed to do.