HEAT EXCHANGER TO BE USED WITH A SOLAR WATER HEATER OR SOLID FUEL FIRE. PRODUCT IS MADE FROM HARDENED ALUMINIUM ALLOY CONSTRUCTION. ALL MANUFACTURING IS DONE BY HAND, SIMPLY BY COILING THE METAL AND ATTACHING THE BANDS TO SECURE THE DEVICE. THE MAIN USE IS TO ALLOW PEOPLE IN DEVELOPING COUNTRIES TO BOIL WATER AT THE SAME TIME AS COOKING, DRASTICALLY REDUCING FUEL CONSUMPTION, WATER BOURNE DISEASES AS IT KILLS BACTERIA IN UNCLEAN WATER AND REDUCES THE TIME SPENT OVER A FIRE. THE DEVICE CAN ALSO BE USED AS A SOLAR WATER HEATER WHERE FUEL IS SCARCE.. THIS ALLOWS THEM TO BOIL 0.5 LITRES OF WATER EVERY 20 MINUTES. THIS PRODUCT IS UNASSEMBLED AS IT REQUIRES OTHER PARTS TO BE ADDED TO MAKE IT EFFECTIVE (FOR EXAMPLE, A GLASSBOX).

THIS HEAT EXCHANGE UNIT HAS BEEN CLASSIFIED TO COMMODITY CODE 8419500090 IN ACCORDANCE WITH THE FOLLOWING: GENERAL INTERPRETATIVE RULES (GIR) GIR1 HAS BEEN USED TO CLASSIFY THIS PRODUCT BY THE TERMS OF HEADING 8419 AND ANY RELEVANT SECTION AND CHAPTER NOTES. GIR2A HAS BEEN USED AS THE GOODS ARE INCOMPLETE/UNFINISHED DUE TO OTHER PARTS WHICH NEED TO BE ADDED TO MAKE IT WORK EFFECTIVELY. GIR6 HAS BEEN USED TO CLASSIFY THE GOODS TO SUBHEADING LEVEL. SECTION NOTES SECTION XVI (IV) INCOMPLETE MACHINES (SEE GENERAL INTERPRETATIVE RULE 2(A)) THROUGHOUT THE SECTION ANY REFERENCE TO A MACHINE OR APPARATUS COVERS NOT ONLY THE COMPLETE MACHINE, BUT ALSO AN INCOMPLETE MACHINE (I.E. AN ASSEMBLY OF PARTS SO FAR ADVANCED THAT IT ALREADY HAS THE MAIN ESSENTIAL FEATURES OF THE COMPLETE MACHINE). HARMONISED SYSTEM EXPLANATORY NOTES HARMONISED SYSTEM EXPLANATORY NOTE (1) (B) HEAT EXCHANGE UNITS IN WHICH A HOT FLUID (HOT GAS, STEAM OR HOT LIQUID) AND A COLD FLUID ARE MADE TO TRAVERSE PARALLEL PATHS, BUT USUALLY IN OPPOSITE DIRECTIONS, SEPARATED BY THIN METAL WALLS IN SUCH A MANNER THAT THE ONE FLUID IS COOLED AND THE OTHER HEATED. THESE UNITS ARE USUALLY OF THREE FOLLOWING TYPES, VIZ, IN THE FORM OF: (i) CONCENTRIC TUBE SYSTEMS: ONE FLUID FLOWS IN THE ANNULAR INTERVAL, THE OTHER IN THE CENTRAL TUBE. (ii) A TUBULAR SYSTEM FOR THE ONE FLUID, ENCLOSED IN A CHAMBER THROUGH WHICH FLOWS THE OTHER FLUID. OR (iii) TWO PARALLEL SERIES OF INTERCONNECTED NARROW CHAMBERS FORMED OF BAFFLE PLATES. COMBINED NOMENCLATURE EXPLANATORY NOTES COMBINED NOMENCLATURE EXPLANATORY NOTES TO 8419 50 00 INCLUDES HEAT EXCHANGE UNITS HEAT EXCHANGE UNITS ARE USED: 1. TO BRING ABOUT A CHANGE OF TEMPERATURE IN FLUIDS OR GASES WITHOUT CHANGING THEIR STATE, THIS CHANGE OF TEMPERATURE BEING IN SOME CASES SUFFICIENT TO CAUSE STERILISATION OR PASTURISATION.; 2. TO VAPOURISE OR CONDENSE FLUIDS.