IC 011. US 013 021 023 031 034. G & S: HEAT EXCHANGERS NOT BEING PARTS OF MACHINES; INSTALLATIONS FOR HEATING, COOLING, AND REFRIGERATING, NAMELY, ELECTRIC HEATING FANS, ELECTRIC RADIATORS FOR HEATING BUILDINGS, ELECTRICAL INDUCTION HEATING APPARATUS FOR HEATING METAL WORKPIECES, HEATING FURNACES FOR INDUSTRIAL PURPOSES, HEATING SYSTEMS COMPOSED PRIMARILY OF TUBES, PIPES AND PRE-ASSEMBLED MANIFOLDS THOUGH WHICH COLD OR LOW TEMPERATURE WATER CIRCULATES, HOT-AIR SPACE HEATING APPARATUS FOR INDUSTRIAL PURPOSES, HOT-WATER SPACE HEATING APPARATUS FOR INDUSTRIAL PURPOSES, PELTIER COOLING AND HEATING APPARATUS, STEAM HEATING APPARATUS FOR INDUSTRIAL PURPOSES, STEAM RADIATORS FOR HEATING BUILDINGS, COMPONENTS FOR AIR CONDITIONING AND COOLING SYSTEMS, NAMELY, EVAPORATIVE AIR COOLERS, COOLING DOMES, COOLING EVAPORATORS, ELECTRIC SPACE COOLING APPARATUS FOR HOUSEHOLD PURPOSES, EVAPORATIVE AIR COOLING UNITS FOR DOMESTIC USE, FOOD AND BEVERAGE COOLING AND HEATING RECEPTACLES CONTAINING HEAT EXCHANGE FLUID FOR HOUSEHOLD PURPOSES, ICE-COOLING REFRIGERATORS FOR HOUSEHOLD PURPOSES, PORTABLE THERMOELECTRIC COOLING AND HEATING UNIT FOR FOOD AND BEVERAGES, WATER COOLING TOWERS, AND REFRIGERATING MACHINES