A bureau is adapted to monitor and forecast weather conditions and to generate forecasting data. A thermostat operatively coupled to an air conditioner/heater initiates and terminates both heating and cooling. A communication network operatively couples the bureau and the thermostat. Operational components within the thermostat are a first screen to display the actual temperature, a second screen to display the desired temperature, a mode switch having a primary position for cooling and a secondary position for heating, and an electronic controller for receiving input from the bureau and for operating the mode switch and for generating signals for the operation of the air conditioner/heater, the interpreting being based upon the generated forecasting data.