AAON Voted "Most Valuable Product" and "Product of the Year" by Consulting-Specifying Engineer Magazine

TULSA, OK--(Marketwire - October 20, 2008) - AAON (NASDAQ: AAON) is pleased to announce that its rooftop products with Digital Precise Air Control (D-PAC) have been voted Product of the Year - Gold in the HVAC category and Most Valuable Product (MVP) for the overall competition.

"We are delighted that the readers of this leading trade journal have recognized our equipment by honoring us with this award," says Norm Asbjornson, President and CEO of AAON. "We greatly appreciate this vote of confidence. It speaks to the great work of our employees and sales representatives who are committed to providing innovative HVAC products of the highest quality and performance."

AAON provides specific and unique solutions for individual customer requirements through residential and commercial semi-custom and custom HVAC products including: air handling units, condensing units, chillers, rooftop units, make-up air units, heat recovery units and coils. Since the founding of AAON in 1988, AAON has maintained a commitment to design, develop, manufacture and deliver heating and cooling products which perform beyond all expectations and demonstrate the value of AAON to our customers.

Companies nominated their best products introduced or refined in 2007. Three finalists were selected in each of 11 categories by a panel of judges comprised of professional engineers who regularly design and specify HVAC, electrical, fire protection, and plumbing systems. Consulting-Specifying Engineer's readers then voted to determine the ranking of the finalists as gold, silver, or bronze winners. Consulting-Specifying Engineer's subscribers also cast one vote for the Most Valuable Product (MVP) distinction among all finalists.

"Competition was fierce this year; the judges had a hard time narrowing the finalists down to three for each category. We take this as a sign that manufacturers are investing more in new-product R&D, which is a huge win for the buildings industry and the environment," said Jim Langhenry, publisher.

Additional information will be in the October issue of Consulting-Specifying Engineer.

About Consulting-Specifying Engineer

Consulting-Specifying Engineer is a monthly publication with a circulation of over 46,000 mechanical, electrical, and plumbing (MEP) engineers.

About AAON

AAON provides designs of the highest quality and performance that lead the HVAC industry.

Contact Information: Contact: Sam Neale Marketing Manager AAON