AAON, Inc. (AAON) is engaged in the manufacture and sale of air-conditioning and heating equipment. The Company’s products consist of rooftop units, chillers, air-handling units, make-up air units, heat recovery units, condensing units, commercial self-contained units and coils. Its products serve the commercial and industrial new construction and replacement markets. Its rooftop and condenser unit markets consist of units installed on commercial or industrial structures of less than 10 stories in height. It offers three groups of rooftop units: RQ, RN and RL Series. It manufactures a LC Series chiller, air-cooled, a LN Series chiller, air-cooled, and a LL Series chiller and packaged outdoor mechanical room, which are available in both air-cooled condensing and evaporative-cooled configurations, covering a range of five to 540 tons. It offers four groups of condensing units: the CB, CC, CN and CL Series. Its subsidiaries include AAON, Inc. and AAON Coil Products, Inc.