Air cleaning units containing an air filter, ultraviolet lights and a photocatalytic filter; Air filters for air conditioners in vehicle passenger compartments; Air filters for air conditioning units; Air filters for domestic use; Air filters for furnaces; Air filters for HVAC units; Air filters for industrial installations; Air filters for vehicle cabins; Air humidifying apparatus; Charcoal roasters for household purposes; Filters for air conditioning; Filters for drinking water; Household air cleaners; Household tap-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, etc