EXHIBIT 32.1

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 Annual Report of Gencor Industries, Inc. (the “Company”) on Form 10-K for the fiscal year ending September 30, 2009 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), each of the undersigned officers of the Company, certify, pursuant to 18 U.S.C. 1350, as adopted pursuant to 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all materials respects, the financial condition and results of operations of the Company.

/s/ E.J. Elliott

E.J. Elliott

Chairman and Chief Executive Officer

December 28, 2009

/s/ L. Ray Adams

L. Ray Adams

Chief Financial Officer

December 28, 2009