Abstract: A load shedding control device, for reducing the electrical energy demand of an electrical load apparatus having a load depending upon ambient temperature, having an ambient temperature responsive switch adapted to be connected in a control system of the electrical load apparatus for reducing the use of electrical energy by the electrical load apparatus as the ambient temperature increases. The ambient temperature responsive switch has its control temperature reset by an artificial heater energized proportionally to the percent of operating time of electrical load apparatus, whereby as the desired operating time of the load apparatus increases, the actual operating time is reduced to conserve electrical energy.

Abstract: .Iadd.A thermostat for controlling heating apparatus is converted to a thermostat for controlling heating and cooling apparatus by the addition of a subbase. The heating thermostat has a double switch attached to a bimetal and a heating anticipation heater whereby heating apparatus is controlled when connected to the terminals of the thermostat. When it is desired to use the thermostat to control both heating and cooling apparatus, the thermostat is removed from the wall and a subbase is placed under the thermostat. The subbase has a cooling anticipation heater which is thermally connected to the bimetal. The subbase has terminals to connect the assembly of thermostat and subbase to the heating and cooling apparatus. .Iaddend.