AIR CONDITIONING PLANTS; VENTILATING SYSTEMS COMPRISED OF VENTILATORS FOR INDUSTRIAL AND COMMERCIAL USE AND VENTILATING LOUVERS AND AIR CONDITIONERS; ENERGY REGENERATION PLANTS; AND PARTS OF THE AFOREMENTIONED GOODS, NAMELY, VENTILATION HOODS; REGENERATIVE AND RECUPERATIVE SOLAR, ELECTRICAL AND NUCLEAR ENERGY REGENERATION PLANTS; AIR HUMIDIFIERS FOR AIR CONDITIONING PLANTS; ELECTRIC AND KEROSENE AIR HEATERS; AIR FILTERS FOR AIR CONDITIONING UNITS; AIR FILTERING PLANTS, AIR COOLING DEVICES, NAMELY EVAPORATIVE AIR COOLERS; AIR PURIFYING APPLIANCES AND MACHINES, NAMELY, AIR PURIFIERS, AIR WASHERS AND HUMIDIFIERS; AIR DRYERS, NAMELY DRYERS USED FOR THE REMOVAL OF SOLID, LIQUID AND VAPOR CONTAMINANTS FROM COMPRESSED AIR AND GASES; HEAT EXCHANGERS NOT BEING PARTS OF MACHINES, NAMELY, ROTARY HEAT EXCHANGERS, PLATE HEAT EXCHANGERS AND HEAT WHEELS, NAMELY, ENERGY RECOVERY ROTORS, ALSO KNOWN AS HEAT WHEELS FOR RECOVERING WASTED ENERGY FROM THE AIR EXHAUSTED FROM THE CONDITIONED SPACES AND USED TO PRECONDITION THE FRESH AIR BEING BROUGHT INTO THE CONDITIONED SPACES TO IMPROVE/MAINTAIN/ENHANCE QUALITY OF AIR IN CONDITIONED SPACES SUCH AS HOTELS, HOSPITALS, COMMERCIAL BUILDINGS, AUDITORIUMS AND ALL OTHER TYPES OF CONDITIONED SPACES; HEAT PUMPS; HEAT RECOVERY DEVICES, NAMELY, HEAT EXCHANGERS NOT BEING PARTS OF MACHINES, HEAT PIPES TO COOL HEAT PRODUCING COMPONENTS; HEAT ACCUMULATORS; GAS, SOLAR, HOT WATER HEATERS FOR DOMESTIC, COMMERCIAL OR INDUSTRIAL USE; WATER HEATERS AND WATER HEATER DEVICES, NAMELY, ELECTRIC HOT-WATER BOTTLES; HOT-WATER HEATING SYSTEMS, COMPRISED OF TUBES, PIPES AND PRE-ASSEMBLED MANIFOLDS THROUGH WHICH COLD OR LOW TEMPERATURE WATER CIRCULATES; STEAM GENERATORS; ELECTROCHEMICAL AND HYDROGEN GAS GENERATORS AND EVAPORATION GENERATORS, NAMELY, STEAM GENERATORS; ELECTRIC FANS, NAMELY FOR AIR CONDITIONING AND AS PIECE PARTS OF AIR CONDITIONING PLANTS, VENTILATING SYSTEMS AND ENERGY REGENERATION PLANTS