Air cleaning units containing an air filter, ultraviolet lights and a photocatalytic filter; Air cooling apparatus; Air filtering installations; Air filters for domestic use; Coils as parts of distilling, heating or cooling installations; Cooling domes; Cooling evaporators; Dampers, namely, control devices used in air ducts to regulate the flow of air; Electric fans with evaporative cooling devices; Electric heaters for commercial use; Electric radiators; Electric space cooling apparatus; Ele...