U.S. federal trademark · Serial No. 97920364
Adaptive gas valve system provided as an integral part of a water heating unit, comprised of an electrically-controlled valve for providing combustion gas to the water heater and an electronic controller that sets an initial position of the valve based on a manual user selection of the type of combustion gas being used by the water heating unit and subsequently controls the position of the valve based on monitoring the burner flame of the water heating unit, automatically allowing the water heating unit to work with a variety of gas types
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