... principle Cost-optimal CE,ISO9001,SGS,CCC OEM Compact/non-pressurized solar water heater,200LSimple structure and working principleCost-optimalCE,ISO9001,SGS ... steelInsulation:Polyurethane,50mm(JNYL);50-60mm(JNQG)Optional spare parts:Electric heater,magnesium rod,assistant tank,reflectorPacking:Export carton with full foamsRemark ...