Abstract: An apparatus and method for thermostatically controlling the operation of a multiple speed fan and light assembly by inputting a desired temperature range and airflow direction for each fan speed and by inputting a single number for controlling the on time and duration of the light assembly. A temperature sensor determines an initial room temperature, an input device enters a temperature set-point corresponding to each of the fan speeds, a processor stores the temperature set-points corresponding to each of the fan speeds from the input device, receives the temperature signal and uses the temperature signal and the temperature set-points to determine a desired fan speed, and a fan driving device changes the initial rotation speed to the desired fan speed in response to the processor and thereby automatically controls the fan speed.