AAON, INC. Fourth Quarter and Full Year 2008 Results Call

TULSA, OK--(Marketwire - March 4, 2009) - 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:

--  Fourth Quarter Performance and Full Year for the period ended
    12/31/2008.
--  Recent Events
--  Future Outlook

    Date of Call:  Wednesday, March 11, 2009
    Time:  4:15 p.m. Eastern Time (3:15 PM Central, 2:15 PM Mountain,
           1:15 PM Pacific)
    Telephone #:  877-852-6576


    Rebroadcast (Available through March 19, 2009)

      Toll Free:      888-203-1112
      PIN Code:       3532384

AAON looks forward to your attendance at the call.

About AAON

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

Contact Information: For Further Information: Jerry R. Levine Ph: (914) 244-0292 Fax: (914) 244-0295 2425 South Yukon Ave. Tulsa, OK 74107-2728 Ph: (918) 583-2266 Fax: (918) 583-6094 http://www.aaon.com