An electrically-powered device designed for in-line heating of banked blood, blood products, intravenous (IV) solutions, and irrigation fluids, typically from about 4ºC to near body temperature (i.e., 35 to 37ºC) before infusion, through the conduction of heat. The device usually includes a surface heat exchanger (e.g., heated dry plate) for the conduction of heat to the infusion blood/fluid via a disposable set (e.g., tubing or pouch); it also includes temperature controls and/or alarms. It is typically mounted on an IV pole under the infusion bag; it does not infuse blood/fluid.