Refrigeration systems comprised of a cooling evaporator, compressor, and condenser sold as a unit for creating and maintaining a chilled environment within * an * [ a home or ] industrial refrigerator [ ; air conditioning systems comprised of a cooling evaporator, compressor, and condenser sold as a unit for creating and maintaining a chilled environment within a home or industrial structure; evaporator coils and evaporation units for refrigeration systems; evaporator coils and evaporation un...