1. Fire dampers of metal, smoke dampers of metal, ventilation gratings, ceiling air vents, slatted vents, floor vents, window parapet induction vents, swirl vents, induction swirl vents, ventilation valves, jalousie shutters, weatherproof gratings, airtight steel doors, ceiling vents with particulate air filters

2. Fire dampers of metal, smoke dampers of metal, ventilation gratings, ceiling air vents, slatted vents, floor vents, window parapet induction vents, swirl vents, induction swirl vents, ventilation valves, jalousie shutters, weatherproof gratings, airtight steel doors, ceiling vents with particulate air filters, flexible connection boxes, included in class 6