A fan thermostat is a device that is used to regulate the temperature of a room or area. It works by sensing the temperature of the air and then turning on or off a fan to adjust the temperature accordingly. The fan thermostat can be used to maintain a comfortable temperature in a room or area, or to save energy by only running the fan when necessary. The fan thermostat can be used in both residential and commercial settings, and can be programmed to maintain a specific temperature or to respond to changes in the environment. The fan thermostat is an important tool for controlling the temperature of a room or area, and can help to reduce energy costs and ensure that the temperature remains comfortable.