Exhibit 15.1

May 16, 2016

Securities and Exchange Commission

100 F Street, N.E.

Washington, DC 20549

Commissioners:

We are aware that our report dated April 29, 2016 on our review of interim financial information of Johnson Controls, Inc. for the three-month and six-month periods ended March 31, 2016 and 2015 and included in the Company’s quarterly report on Form 10-Q for the quarter ended March 31, 2016 is incorporated by reference in Amendment No. 1 to Tyco International plc’s Registration Statement on Form S-4 dated May 16, 2016.

Very truly yours,

/s/ PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP