Abstract: The invention relates to an air flow controllable register unit for controlling flow of air through the register from an air circulating system having a register air flow supply duct. The air flow is controlled in response to an externally provided control signal that commands the register flow control unit to provide differing air flow rates through the register. The register unit includes a register flow control apparatus which has a power generating device that includes a rotary mounted air turbine positioned within the register air flow supply duct. The air turbine is coupled to a generator to drive the same upon air flow against blades of the turbine. The air driven turbine initially restricts air flow of the register at system start-up.

Abstract: The invention is directed to a control system for an air delivery system having a supply duct through which air is delivered into at least one independently controlled zone or room through an air delivery register. The control system for one zone or room includes a wireless air flow control thermostat to transmit a wireless air flow control signal output to an electrically powered and electrically self sufficient register air flow control unit that controls the flow of the air through the register in response to receiving the wireless airflow control signal output. The electrically powered and electrically self sufficient register air flow control unit includes an electrical generator to provide power in response to flow of air through the register from the supply duct. The generated electric power is delivered to the register air flow control unit to thereby maintain the register flow control unit electrically self sufficient and free from the need of any outside electrical power source.