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 Lennox International Inc. (the “Company”) on Form 10-K for the fiscal year ending December 31, 2003 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), each of the undersigned, Robert E. Schjerven, Chief Executive Officer of the Company, and Susan K. Carter, Chief Financial Officer of the Company, certifies, pursuant to 18 U.S.C. section 1350, as adopted pursuant to section 906 of the Sarbanes-Oxley Act of 2002, that to his or her knowledge:

     (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 material respects, the financial condition and result of operations of the Company.

/s/ Robert E. Schjerven  

Robert E. Schjerven 

Chief Executive Officer 

October 18, 2004

/s/ Susan K. Carter  

Susan K. Carter 

Chief Financial Officer 

October 18, 2004

     A signed original of this written statement required by Section 906 has been provided to Lennox International Inc. and will be retained by Lennox International Inc. and furnished to the Securities and Exchange Commission or its staff upon request. The foregoing certification is being furnished to the Securities and Exchange Commission as an exhibit to the report.