Serving The Metropolitan Chicago area since 1972. Sub Zero Refrigeration offers Trane Air Conditioning, American Standard Heating, Manitowoc Ice Machine, Scotsman Ice Machine, Hosizaki Ice Machine, Aroaire Furnace, Arocaire Air Conditioner, Trane Furnace, Trane Air Conditioner, American Standard Air Conditioner, American Standard Furnaces. Sub Zero Refrigeration Heating and Cooling services all makes and models of Air Conditioners, Furnaces and Refrigeration Equipment. BBB Accredited and we manitain an A+ rating with the Better Business Bureau.