Air cleaning units containing an air filter, ultraviolet lights and a photocatalytic filter; Combination ozone sanitizer and electric deodorizing units; Disinfecting ultraviolet lamps housed in a container or cover for disinfecting objects placed therein; Emission control systems comprised primarily of indirect contact heat exchangers and ozone-based control devices using gas and vapor condensing to control and treat emissions; Oxygen concentrators for use with fuel cells used in heating, ventilation, air conditioning, lighting, and power systems for buildings; Oxygen generator based on thermal decomposition of oxygen rich salts; Oxygen generator for processing water by increasing oxygen content in the water; Ozone generators that kill mold and mildew; Ozone sanitizers for air and water; Sanitizing apparatus for linens using ultraviolet light, ozone sterilization and low pressure techniques; Sanitizing apparatus using ultraviolet light for sanitizing air and water not for medical purposes; Ultraviolet lamps not for medical purposes; Water treatment equipment, namely, ultraviolet sterilization units