Air-conditioning, air cooling and ventilation apparatus and instruments; Air filtering installations; Air purifying apparatus and machines; Air sterilisers; Clean room installations; Electric air deodorizing apparatus; Filters for air conditioning; Gas scrubbing apparatus; Germicidal lamps for purifying air; Water purification installations

Air condensers; Air filters for mechanical purposes; Central vacuum cleaning installations; Cleaning appliances utilizing steam; Dust exhausting installations for cleaning purposes; Dust removing installations for cleaning purposes; Filters for cleaning cooling air, for engines; Vacuum cleaners; Vacuum cleaners for industrial purposes; Vehicle washing installations