SMITH A O CORP - FORM 10-Q - EX-32.1 - WRITTEN STATEMENT OF THE CHIEF EXECUTIVE OFFICER

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EXCEL - IDEA: XBRL DOCUMENT - SMITH A O CORP	Financial_Report.xls
EX-31.2 - CERTIFICATION OF PERIODIC REPORT BY THE CHIEF FINANCIAL OFFICER - SMITH A O CORP	d338089dex312.htm
EX-10.1 - FORM OF INCENTIVE COMPENSATION AWARD AGREEMENT - SMITH A O CORP	d338089dex101.htm
EX-31.1 - CERTIFICATION OF PERIODIC REPORT BY THE CHIEF EXECUTIVE OFFICER - SMITH A O CORP	d338089dex311.htm
10-Q - FORM 10-Q - SMITH A O CORP	d338089d10q.htm
EX-32.2 - WRITTEN STATEMENT OF THE CHIEF FINANCIAL OFFICER - SMITH A O CORP	d338089dex322.htm

Exhibit 32.1

Written Statement of the Chief Executive Officer Pursuant to 18 U.S.C. Section 1350

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, the undersigned certifies that to the best of my knowledge:

(1)	the Quarterly Report Form 10-Q of A. O. Smith Corporation for the quarter ended March 31, 2012 (the “Report”) fully complies with the requirements of Section 13(a) or Section 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 results of operations of A. O. Smith Corporation.

May 7, 2012

/s/ Paul W. Jones

Paul W. Jones

Chairman and Chief Executive Officer

SMITH A O CORP - FORM 10-Q - EX-32.1 - WRITTEN STATEMENT OF THE CHIEF EXECUTIVE OFFICER - May 7, 2012