PEERLESS MFG. CO. AND SUBSIDIARIES
                                   FORM 1O-Q
                      FOR THE PERIOD ENDED MARCH 31, 2003

                                                                    Exhibit 99.1



                CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,
      as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
      ---------------------------------------------------------------------

In connection with the Form 10-Q of Peerless Mfg. Co. (the "Company") for the
quarter ended March 31, 2003, as filed with the Securities and Exchange
Commission on the date hereof (the "Report"), I, Sherrill Stone, Chief Executive
Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted
pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Report fully
complies with the requirements of Section 13(a) or Section 15(d) of the
Securities Exchange Act of 1934, as amended, and the information contained in
the Report fairly presents, in all material respects, the financial condition
and results of operations of the Company.


                                                        /s/ SHERRILL STONE
                                                        ------------------------
                                                        Sherrill Stone
                                                        Chief Executive Officer
                                                        Date: May 15, 2003
                                                              ------------------



Note: This certification accompanies the Report pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002 and shall not be deemed filed, except to the extent
required by the Sarbanes-Oxley Act of 2002, by the Company for purposes of
Section 18 of the Securities Exchange Act of 1934, as amended. A signed original
of this written statement has been provided to the Company and will be retained
by the Company and furnished to the SEC or its staff upon request.