FIX and AAON, Inc. AAON have been leveraging from maintaining, monitoring and repairing services along with prudent cost-management practices. Price and Consensus: FIX AAON, Inc.: Based in Tulsa, OK, AAON engineers, manufactures and markets air conditioning as well as heating equipment. Despite inflationary cost pressures, the BasX acquisition, which was closed in December 2021, has been delivering solid results for AAON.