Air cooling apparatus; Air processing (cooling) apparatus; Apparatus for the cooling of objects using cold gases; Apparatus for the cooling of objects using liquefied gases; Cooling apparatus; Electric cool boxes; Electric cooling apparatus; Electric cooling fans; Installations for the cooling of air; Apparatus for exhausting dust (ventilation); Apparatus for exhausting particles (ventilation); Apparatus for ventilating; Electric fans for ventilation; Electrical installations for ventilating; Electrically powered air blowers for ventilation purposes; Electrically powered blowers for ventilation; Electrically powered fans for ventilation purposes; Extractor units (ventilation); Extractors (ventilation or air conditioning); Fans for ventilating; Filters for exhaust extractors (parts of ventilation installations); Industrial ventilation apparatus; Ventilating apparatus; Ventilating fans; Ventilating hoods; Ventilation apparatus; Ventilation hoods; Ventilation installations