Dampers for ventilating installations; Electric fans for ventilation; Electrical appliances for ventilating; Electrical fans being parts of household ventilation installations; Electrical installations for ventilating; Fans for ventilating; Filters for exhaust extractors (parts of ventilation installations); Filters for use with apparatus for ventilating; Industrial ventilation apparatus; Installations for ventilating; Louvres being ventilating apparatus; Motorised fans for ventilation; Residential ventilating units; Ventilating fans; ventilation apparatus; motorised fans for ventilation; ventilation grilles being parts of extractor fans; Combination fire and smoke dampers; Dampers for ventilating installations; Louvres being ventilating apparatus