Patent ID: 7434744

Claim:
A climate control system comprising: an alternating current low voltage transformer that conducts a low-frequency low-voltage waveform across hot and common power transmission lines; a thermostat controller, a controller for a heating system, and at least a controller for a compressor of a heat pump or air conditioning system, the thermostat controller, heating system controller and compressor controller being connected to each other only through each controller's individual connection to the hot and common power transmission lines; wherein each of the individual thermostat, heating system and compressor controllers are configured to recognize a command that is unique to the specific thermostat, heating system controller or compressor controller, which unique command will only request operation of the specific controller, and each controller is capable of transmitting one or more signals that are superimposed onto the low-frequency low-voltage waveform and include information identifying a destination controller that the signals are intended for.