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