AAON Rooftop Unit Is Winner in ACHR News 2009 Dealer Design Awards

TULSA, OK--(Marketwire - July 13, 2009) - AAON (NASDAQ: AAON) was recognized for excellence in product design in the 5th annual Dealer Design Awards Program sponsored by The Air Conditioning Heating & Refrigeration News magazine. An independent panel of 41 contractors acted as judges in the contest that had 124 entries from 84 different brands. The company's RN Series was the Bronze Winner in the HVAC Light Commercial Equipment category. The ACHR News is the leading trade magazine in the heating, ventilating, air conditioning, and refrigeration industries.

News Publisher John Conrad stated, "These awards give us a unique opportunity to recognize the outstanding research and development efforts that go into many of the products serving the HVACR industry and the awards issue gives our readers an opportunity to read about innovative installation and service solutions."

RN Series rooftop units, from 7-70 tons, are designed to be energy efficient and easily serviceable. Features include maintenance free direct drive supply fans, lockable hinged doors which provide quick service access to every section of the unit, energy saving double wall construction with an insulating value of R-13, and 10-100% variable capacity scroll compressors which increase the part load efficiency of the unit and eliminate the need for hot gas bypass.

"The recognition of three AAON products (RN, SA, and LC Series) in the 2009 Dealer Design Awards demonstrates our continuing commitment to designing and engineering innovative and high performance HVAC equipment," said Norm Asbjornson, President and CEO of AAON.

Winning entries in the Dealer Design Awards were featured in the July 13, 2009 issue of The ACHR News, which is distributed nationally to over 33,000 HVACR contractors, wholesalers, and other industry professionals.

About AAON

AAON is engaged in the engineering, manufacturing, marketing and sale of air conditioning and heating equipment consisting of standard, semi-custom and custom rooftop units, chillers, boilers, air handling units, make-up air units, heat recovery units, condensing 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 to perform beyond all expectations and demonstrate the value of AAON to our customers. For more information, please visit www.aaon.com.

Contact Information: Contact: Sam Neale 918-583-2266