Air cleaning units containing an air filter, ultraviolet lights and a photocatalytic filter; Air filtering installations; Air filters for air conditioners in vehicle passenger compartments; Air purifying apparatus; Air sterilising apparatus; Electric air sanitizing unit; Filtering units for water filtering, producing potable water for domestic use; Filters and filtering devices for air and gas conditioning; Filters for air conditioning; Filters for drinking water; Gas purification machines; HEPA filters for household use; Water treatment equipment, namely, water filtration units; Air filters for air conditioning units; Air filters for domestic use; Air filters for industrial installations; Water filtering apparatus; Water filters; Water filtration and purification units and replacement cartridges and filters therefor; Water filtration and purification units and replacement cartridges and filters therefor for refrigerators, ice makers