Abstract: A remote control thermostat system for controlling electric devices for remotely controlling electric heating and cooling devices for regulating temperatures inside a structure. The remote control thermostat system for controlling electric devices includes a thermostat with a transmitter for emitting signals varying with the ambient temperature around the thermostat. A control unit is in communication with a power source and has a receiver for receiving the signals from the thermostat. The control unit is adapted for selectively permitting flow of power to an electric device in response to signals received from the thermostat.

Abstract: An interface is disclosed for operatively interconnecting a conventional thermostat and an electronically commutated motor ("ECM"). The interface provides enable, heating and rate signals to the ECM in response to the conventional fan, heat, valve and airflow signals from the thermostat.

Abstract: A control circuit for a liquid fuel combustion apparatus which employs a differential amplifier and square-wave generator to maintain a strong constant combustion in the burner until the differential amplifier senses that room temperature has approached a preselected target temperature, at which point the differential amplifier operates to alter the square-wave generator output to gradually reduce the combustion rate in an inverse proportion to room temperature as the target temperature is being reached. The differential amplifier subsequentially controls the square-wave generator in a manner which causes fuel to be available at a rate necessary and sufficient for maintaining the target temperature.