The CCR3+ Controller is an electronic controller for return temperature control in risers in one-pipe heating system based on supply temperature signal. With CCR3+ controller onepipe heating system becomes efficient variable flow system with riser’s flow control based on heat demand. CCR3+ is dedicated to be used with AB-QM automatic balancing & control valve equipped with thermo actuators type TWA-Q (NO) and remote temperature sensors type ESMC. CCR3+ together with AB-QM and TWA-Q is complete one-pipe electronic solution: AB-QTE.