TULSA — AAON Inc., a Tulsa-based manufacturer of large heating and cooling units, booked a third-quarter profit of $13.3 million, up 6.5 percent from the same period last year. In the quarter, net sales slipped 8.3 percent to $94.4 million. Earnings per diluted share in the third quarter of 2015 were 24 cents, up 9.1 percent from 22 cents for the same period the previous year, based upon 54.6 million and 55.5 million shares outstanding at Sept.Read more on NewsOK.com