non-pressurized solar water heater The CN-YS02 type has the stainless shell,so it can be ... ,20pcs,24pcs,30pcs3,Outer tank material:202stainless steel with 0.31mm4,Inner tank material:SUS304- ... or 55mm6,Optional electric heater:220v-240v 1500w/3000w7,frame material :202 stainless steel8,we could product ... residentbuildings.non-pressurized solar water heater stainless steel non-pressurized solar water ...