What is a common use of thermistors in HVAC systems?

Thermistors are temperature-sensitive resistors widely used in HVAC systems because their resistance changes significantly with temperature variations. This characteristic allows thermistors to measure temperature accurately. In HVAC applications, they are primarily employed to provide feedback for temperature control, enabling the system to maintain desired conditions by adjusting heating or cooling outputs accordingly. This precise temperature measurement and control are crucial for ensuring comfort and efficiency in heating, ventilation, and air conditioning processes.

While humidity measurement is essential in HVAC systems, it typically involves different types of sensors, such as hygrometers, rather than thermistors. Controlling electrical currents is more commonly associated with devices like relays and contactors. Detecting gas leaks involves other specialized sensors, often based on different technologies. In summary, the ability of thermistors to accurately measure temperature and enable system adjustments makes them a key component in HVAC systems.