Abstract: A control for interior environmental energy system comprising a portable thermostat comprising a temperature indicator, an electromagnetic pulse transmitter and means to trigger the pulse transmitter with a coded "on" and a coded "off" pulse in response to the temperature in the room where the thermostat is located, an actuator unit in communication with the energy unit that contains means for receiving said energy pulses and relaying them to the energy system and that is latched into a stabilized on or off position through repeated receipt of the specific codes and a fail safe system that either closes down the control or transfers control to conventional built-in controller upon failure to receive coded pulses over a specific time period.