[Purpose] midnight electric furnace heated fluid obtained by heating a fluid heater axial ten water tankaxial ten water tank when heating to hot water water in thermal in real estate can be conserved as the old long hot water in a storage part.. [Configured] Midlight electricity using static mixer and it' s a plurality of system heating pipe (14) and recycle chamber (15) is recycle body (6) to be formed in, heating body (5) and a recycle body (6) ventilation a thermoelectric connected distinguish between (4) a axial ten water tank (1) are formed on the lower end of, axial ten water tank (1) supported by in heating body (5) on top of inlet water supply of heating of integrally bladed minister style (7) where a circuit breaker, inlet header chamber diaphragm (9) and an outlet header chamber (10) is heating body (5) and formed at a predetermined position of the inner surface of the recycle body (6) recycle heating lower end one side of inlet (12) and a recycle heating on other side top department outlet (13) characterized in that is formed on a. [Effect] the hot water is thermal in axial ten water tank abruptly preventing the space for and it is, lower part pipingit is efficiency than enemy within time due to make work.