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Apparatus, equipment, systems and devices for aerating and ventilating rooms and facilities in buildings, namely, air-conditioning, air cooling and ventilation apparatus and instruments, air ducts being part of ventilation apparatus, systems, installations and instruments, ventilating fans for commercial and industrial use, and blowers being parts of air conditioning and ventilation apparatus; electric ventilating fans; ventilation, smoke extraction windows and flaps, namely, ventilating louvers, including ventilating louvers of glass and plastic; filters, namely, air filters for industrial and domestic use; heating, ventilating and smoke extraction installations