Air cleaning units containing an air filter, ultraviolet lights and a photocatalytic filter; Air exchangers for cleaning and purifying air; Air filtering units; Air filters for air conditioners in vehicle passenger compartments; Air filters for air conditioning units; Drying apparatus for use in heating, ventilation systems, air conditioning systems and refrigeration systems; Fabric air dispersion ducts for distributing and dispensing air as part of a HVAC system; Fibrous filtering media for ...