Profile: Groban Supply Company Inc. deals with new, used, and surplus federal & state government machinery. We specialize in alternators, generators sets, motor generators, hydraulic and pneumatic pumps, motors, cylinders, AC & DC electric motors, valves, military air conditioners, aircraft linear actuators and gauges. We also provide military and industrial surplus generator sets. Our ground units are used to supply air conditioning to large aircraft while on the ground. They can be used in many other cooling applications such as to cool offices, warehouses, theaters, tents, and a variety of ongoing or emergency cooling needs. The units are operated outside, while the chilled air is transmitted quietly to the area to be cooled via two 8" diameter accordion like insulated ducts/hose (not-included).