Exhibit

We hereby consent to the incorporation by reference in the Registration Statement on Form S-3 (No. 333-211035) and in the Registration Statements on Form S-8 (Nos. 333-207193, 333-197704, 333-183123, 333-177517, 333-175781, 333-150643, 333-125293, 333-110020, 333-100724, 333-100723, 333-100718 and 033-51385) of United Technologies Corporation of our report dated February 8, 2018 relating to the consolidated financial statements and the effectiveness of internal control over financial reporting, which appears in the Annual Report to Shareowners, which is incorporated in this Annual Report on Form 10‑K. We also consent to the incorporation by reference of our report dated February 8, 2018 relating to the financial statement schedule, which appears on page S-I of this Form 10‑K.