TULSA, OK -- (Marketwire) -- 08/03/09 -- AAON, INC. (NASDAQ: AAON). A question and answer session will follow a brief presentation by our President, Norman Asbjornson. The entire call should last about 45 minutes.

The call will cover:

--  Second Quarter Performance for the period ended 06/31/2009.
--  Recent Events
--  Future Outlook

    Date of Call:   Monday, August 10, 2009
    Time:           4:15 p.m. (Eastern Time)
    Telephone #:    1-877-737-1669
    Pass code:      VL 17801
    Rebroadcast (Available through August 17, 2009)
            Toll Free:  1-800-355-2355
            Pass code:  178018

AAON looks forward to your attendance at the call.

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 visit www.aaon.com.