... water heater The CN-YS02 type has the stainless shell,so it can be used in the rain ... 1,vacuum tube length:47/1500mm,58/18002,vacuum tubes:15pcs,18pcs,20pcs,24pcs,30pcs3,Outer tank material: ... heater:220v-240v 1500w/3000w7,frame material :202 stainless steel8,we could product for customer'special needIt has ... 15years long life span ,and the vacuum tubes can work individually,so if the only one of ...