... it more efficient and energy saving.4, Multifunction: bathing, washing ,domestic heating etc..5, The max. hot water temp. can reach ... stainless steel.d, Glass tube: new trivalent element heat tube, borosilicate glass 3.3.e, Water capacity: 100L,150L,200L,300L,360L, non-pressurized water ... .60120DK5818-303.84581800302802.30142DK5818-364.6581800363502.90162 Vacuum tube stainless steel solar water heater