Air filtering equipment; air purifying apparatus; air sanitizing equipment; air cleaning units; air sanitizing equipment including a particulate filter, an antimicrobial filter, an odor-control filter, and/or a surface-contaminant filter; air sanitizing equipment including ultraviolet lamps and/or titanium dioxide units for photocatalytic disinfecting; air sanitizing equipment including filters for airborne microorganisms, volatile organic compounds, molds, pathogens, and/or ethylene; and air sanitizing equipment for use in enclosed spaces including for food processing, perishables transportation and storage, greenhouses, warehouses, manufacturing facilities, healthcare facilities, laboratories, clean rooms, schools, vehicles, cruise ships, public spaces, restaurants, and bathrooms