(under subclass 465) Subject matter wherein the heating device includes a fluid which is heated by the heating element for subsequent transmission to the flow path for heating up the continuous flow of fluid.
SEE OR SEARCH THIS CLASS, SUBCLASS:
302, for borehole type.
344, for convection space heating in heat storage.
357+, for fluid heat absorber.
377, for convection combined with radiation.
456, for heat exchange fluid line connected heated storage tank.
SEE OR SEARCH CLASS 126, Stoves and Furnaces,
375, for water heating vessels with heat accumulator means.
165, Heat Exchange,
104.11+, for intermediate fluent heat exchange material receiving and discharging heat.
239, Fluid Sprinkling, Spraying, and Diffusing,
139, for spaced jacket or compartment for heating fluid.
252, Composition,
67+, for vaporization, or expansion, refrigeration or heat or energy exchange.
