The present invention is a system for controlling the heating of a plurality of individual housing units in a building. The system includes at least one heating unit contained in each individual housing unit for heating said individual housing unit and a control unit coupled to each of the heating units for controlling the heat output of the control units. At least one outside temperature sensor is coupled to the control unit for providing the control unit with the measured temperature of the air outside the building. The control unit has an algorithm which is configured to decrease the heat output of the heating units when the temperature of the air outside the building increases beyond a predefined minimum outside temperature.