Leading HVAC manufacturer selects Memphis for $238 million investment, create more than 800 new jobs in Shelby County AAON, Inc. (NASDAQ: AAON), a global leader in HVAC solutions, employing nearly 4,000 people worldwide, will expand its presence to Tennessee. The company engineers, manufactures and sells premium HVAC equipment consisting primarily of semi-custom and custom rooftop … Continue reading HVAC manufacturer to establish operations in TN