Air cleaning units containing an air filter, ultraviolet lights and a photocatalytic filter; Air filtering units; Air filters for air conditioners in vehicle passenger compartments; Air filters for air conditioning units; Air filters for domestic use; Air filters for industrial installations; Air fryers; Air purification units; Air purifiers; Electric food warmers in the nature of dishes, portable household appliances, bowls and trays; Filters and filtering devices for air and gas conditioning; Filters for air conditioning; Filters for drinking water; Filters for fluids, namely, for water and area-water solutions; Water filtration and purification units and replacement cartridges and filters therefor