A device (100) is disclosed for heating a flow of liquid from an initial temperature to a desired temperature for intravenous delivery. The device comprises: (a) An elongated conduit (120) formed from metallic material and having an inlet for receiving the flow of liquid at the initial temperature and an outlet for delivering the flow of liquid at the desired temperature. (b) At least one temperature sensing arrangement (160, 162) associated with the conduit (120) and deployed to generate an output indicative of a temperature of the liquid at at least one location along the tube (120). (c) A controller (140) associated with the temperature sensing arrangement and deployed to apply a voltage from a power supply to generate electrical current flowing within at least one length (L1, L2, L3) of the wall of the conduit (120). The electrical current generates heat within the conduit wall to warm the flow of liquid to the desired temperature at the outlet.
