Ventilation [air-conditioning] installations and apparatus; ventilation apparatus; ventilation grilles being parts of extractor fans; ventilation installations for kitchens; ventilation terminals; air impellers for ventilation; air inductor apparatus [ventilation]; electric fans for ventilation; electrical fans being parts of household ventilation installations; 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]; motorised fans for ventilation; ventilation [air-conditioning] installations and apparatus; ventilation apparatus; ventilation grilles being parts of extractor fans; ventilation installations for kitchens; ventilation terminals; air impellers for ventilation; air inductor apparatus [ventilation]; electric fans for ventilation; electrical fans being parts of household ventilation installations; 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]; hvac systems (heating, ventilation and air conditioning); motorised fans for ventilation.