AAON Announces Inclusion in Forbes 200 Best Small Company List

TULSA, OK--(Marketwire - October 23, 2008) - AAON, Inc. (NASDAQ: AAON), a premier provider of heating and cooling equipment, today announced that for the second consecutive year, it has been named one of "America's 200 Best Small Companies" by Forbes magazine. AAON is ranked #150 in the October 27th issue.

To qualify, companies must have sales between $5 million and $750 million and a stock price of at least $5 as of Sept. 29, 2008. The ranking is based on return on equity, sales growth and profit growth over the past twelve months and also over five years. Forbes also compares the company's stock performance with that of its industry peers.

This is the fifth time that AAON has been honored with the listing with a previous listing in 2007 at #133 and consecutive listings occurring in 2000 through 2002.

Norm Asbjornson, President & CEO of AAON, said, "We are very honored to be recognized as one of 'America's Best 200 Small Companies.' This ranking reflects the hard work, dedication and commitment of every employee at AAON. Our primary focus at AAON has been, and will continue to be, on delivering consistent and profitable growth to our shareholders."

About AAON

AAON is a Tulsa, Oklahoma based manufacturer of semi-custom and custom heating and cooling products, including air handlers, condensing units, chillers, rooftop units and boilers.

Contact Information: For Further Information: Jerry R. Levine Phone: (914) 244-0292 Fax: (914) 244-0295 Email: