Fan thermostats are essential components in heating, ventilation, and air conditioning (HVAC) systems that play a crucial role in maintaining a comfortable indoor environment while optimizing energy efficiency. In this article, we will explore the functions, benefits, and applications of fan thermostats.
What Is a Fan Thermostat? A fan thermostat, also known as a fan limit switch, is a control device used in HVAC systems to regulate the operation of the blower fan. It is typically located within the furnace or air handler and works in conjunction with the main thermostat, which monitors the temperature of the space. How Does It Work? The fan thermostat consists of a temperature sensor and a switch. When the temperature in the HVAC system’s air ducts reaches a preset level, the thermostat activates the blower fan. Conversely, when the temperature drops below the set point, the thermostat turns off the fan. This cycling of the fan ensures that warm or cool air is distributed throughout the living space when needed, promoting comfort.
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