Air cleaning units containing an air filter, ultraviolet lights and a photocatalytic filter; Combination ozone sanitizer and electric deodorizing units; Devices for generating smoke for signaling; Fog machines; Hair dryer diffusers; Heating and cooling apparatus for dispensing hot and cold beverages; Humidifiers; Ice boxes; Sockets for electric lights; Sterilizers; Temperature-controlled food and beverage dispensers, and components thereof; Thermoelectric cooler/heater for food and beverages;...