Air cleaning units containing an air filter, ultraviolet lights and a photocatalytic filter; Air conditioners; Air filtering units; Air filters for air-conditioning units; Air purifiers; Dehumidifiers; Filters for air conditioning; Humidifiers; Industrial scrubbers for removing particulate matter from the air during industrial processing, namely, impingement scrubbers, venturi scrubbers, dynamic scrubbers; Ionisation apparatus for the treatment of air; Ozone generators for air purification; V...