Exhibit 15

May 3, 2013

Securities and Exchange Commission

100 F Street, N.E.

Washington, DC 20549

Re: Johnson Controls, Inc. Registration Statement Nos. 333-157502, 333-178148 and 333-179613 on Form S-3 and 33-30309, 33-31271, 33-58092, 33-58094, 333-10707, 333-41564, 333-141578 and 333-173326 on Form S-8.

Commissioners:

We are aware that our report dated May 3, 2013 on our review of interim financial information of Johnson Controls, Inc. (the "Company") as of and for the three-month and six-month periods ended March 31, 2013 and 2012 and included in the Company's quarterly report on Form 10-Q for the quarter ended March 31, 2013 is incorporated by reference in the above referenced Registration Statements.

Very truly yours,

/s/ PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP

Milwaukee, Wisconsin