AAON, Inc. is a producer of heating, ventilation, and air conditioning (HVAC) systems for commercial and industrial indoor environments. The Company operates through three segments: AAON Oklahoma, AAON Coil Products, and BASX. The AAON Oklahoma segment engineers, manufactures, and sells, semi-custom, and custom HVAC systems, designs and manufactures control solutions, and sells retail parts to customers through retail part stores and online. AAON Coil Products segment engineers and manufactures a selection of semi-custom and custom HVAC systems as well as a variety of heating and cooling coils to be used in HVAC systems. BASX segment engineers, manufactures, and sells an array of custom, high-performance cooling solutions for the hyperscale data center market, ventilation solutions for cleanroom environments in the biopharmaceutical, semiconductor, medical and agriculture markets, and highly custom, air handlers and modular solutions for a vast array of markets.