Air cleaning units containing an air filter, ultraviolet lights and a photocatalytic filter; Air humidifiers; Air purification units; Air purifiers; Air purifying apparatus; Air purifying apparatus and machines; Air sterilizers; Air sterilizers for household purposes; Air sterilizers for hospitals; Apparatus for disinfecting water; Electric air sanitizing unit; Gas purification machines; Vehicle-mounted air purifying apparatus; Water purification and filtration apparatus; Water sterilisers