Exhibit 23

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S‑8 (Nos. 333-110020 and 333-177520) of United Technologies Corporation of our report dated June 29, 2015 relating to the financial statements of the United Technologies Corporation Employee Savings Plan, which appears in this Form 11-K.

/s/ PricewaterhouseCoopers LLP

Hartford, Connecticut

June 29, 2015

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