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Steel doors for use in ventilation installations, machine and engine rooms, and storage facilities
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Ventilation and air-conditioning installations as well as accessories and parts therefor, namely air intake and evacuation grilles, blower heads, valves, shut-off valves and shutters, pressure control valves, throttle valves, grease trapping grilles, air-regulating louvres, ventilation grilles with filters, heating chamber ventilation grilles, grilles for tiled stoves, secondary doors, ventilation doors, cold air grilles and ventilator devices for tiled stoves, as well as cleaning hatches, particulate air filter chambers, surrounding air admission grilles, acoustic wave protection grilles, louvre valves, volume regulators, ceiling, wall and floor outlets; slot outlets, swirl outlets, fountain outlets; wide-angle nozzles with and without servomotors or air-regulating slats or jet guides as well as with and without air volume regulation, bathroom ventilators, window demisters, window fans, partitioned zone outlets, extracted air disc valves, cover plates for disc valves, disc valves for fire protection, fire protection dampers, smoke extraction dampers, smoke-activated switches for automatic closing of fire protection dampers; filter chambers, cased air-conditioning appliances, sound absorbers with and without mineral wool for ventilation and air-conditioning installations, telephony sound absorbers and disc valves, ventilation apparatus for a protective environment and parts thereof