40 Rental and installation of electrical generators, resistive and reactive loadbanks, electric voltage transformers, fuel tanks, cables, distribution equipment, namely, circuit breakers, synchronization equipment, switchgear, load panels, panel boards and transformer distribution centres, namely, single enclosed units containing electric voltage transformers, circuit breakers, load panels, cables, and connections therefor, air-cooled chillers, and water-cooled chillers, for use in the residential, commercial, and industrial chilling of liquids and gases, evaporative and closed loop cooling towers, air conditioners, spot coolers, namely, spot coolers for cooling air, air handlers, electric heaters for radiative, conductive, and convective heating, heat exchangers, refrigerative dehumidifiers, desiccant dehumidifiers, pumps, piping, ducts and valves therefor, oil-free air compressors, desiccant-based air dryers, refrigerated air dryers, air-cooled aftercoolers, watercooled aftercoolers and hoses, fittings, manifolds, boosters, pressure regulators and air receivers therefor; advisory, information and consultancy services in the field of rental and installation of the aforementioned equipment