nVent Electric (NVT) DEFA14AAdditional proxy soliciting materials

Your Vote Counts! NVENT ELECTRIC PLC 2023 Annual General Meeting Vote by May 10, 2023 11:59 PM ET You invested in NVENT ELECTRIC PLC and it’s time to vote! You have the right to vote on proposals being presented at the Annual General Meeting. This is an important notice regarding the availability of proxy material for the shareholder meeting to be held on May 12, 2023. Get informed before you vote View the Annual Report on Form 10-K, Notice of Annual General Meeting, Proxy Statement and Irish Statutory Financial Statements and Related Reports online OR you can receive a free paper or email copy of the material(s) by requesting prior to April 28, 2023. If you would like to request a copy of the material(s) for this and/or future shareholder meetings, you may (1) visit www.ProxyVote.com, (2) call 1-800-579-1639 or (3) send an email to sendmaterial@proxyvote.com. If sending an email, please include your control number (indicated below) in the subject line. Unless requested, you will not otherwise receive a paper or email copy. Vote in Person at the Meeting* May 12, 2023 8:00 AM British Summer Time The Lanesborough London Hyde Park Corner London, SW1X 7TA, United Kingdom** *Please check the meeting materials for any special requirements for meeting attendance. At the meeting, you will need to request a ballot to vote these shares. **If we are unable to hold the meeting at the location, date and/or time, it will be held at an alternative location, date and/or time that we will publicly announce. Smartphone users Point your camera here and vote without entering a control number V1.1 For complete information and to vote, visit www.ProxyVote.com Control # V07941-P88063 NVENT ELECTRIC PLC C/O BROADRIDGE 51 MERCEDES WAY EDGEWOOD, NY 11717

THIS IS NOT A VOTABLE BALLOT This is an overview of the proposals being presented at the upcoming shareholder meeting. Please follow the instructions on the reverse side to vote these important matters. Vote at www.ProxyVote.com Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click “Sign up for E-delivery”. Voting Items Board Recommends V07942-P88063 1. By Separate Resolutions, Election of Director Nominees: Nominees: 1c. Susan M. Cameron 1a. Sherry A. Aaholm 1d. Michael L. Ducker 1b. Jerry W. Burris 1e. Randall J. Hogan 1f. Danita K. Ostling 1g. Nicola Palmer 1h. Herbert K. Parker 1i. Greg Scheu 1j. Beth A. Wozniak 2. Approve, by Non-Binding Advisory Vote, the Compensation of the Named Executive Officers 3. Ratify, by Non-Binding Advisory Vote, the Appointment of Deloitte & Touche LLP as the Independent Auditor and Authorize, by Binding Vote, the Audit and Finance Committee of the Board of Directors to Set the Auditor’s Remuneration 5. Authorize the Board of Directors to Opt Out of Statutory Preemption Rights under Irish Law 6. Authorize the Price Range at which nVent Electric plc Can Re-allot Shares it Holds as Treasury Shares under Irish Law NOTE: To consider and act on such other business as may properly come before the Annual General Meeting or any adjournment. For For For For For For For For For For For For For For For 4. Authorize the Board of Directors to Allot and Issue New Shares under Irish Law

1 Be the vote that counts. NVENT ELECTRIC PLC 2023 Annual Meeting May 12, 2023

2 VOTE NOW Why Should I Vote? As an investor in this security, you have the right to vote on important matters. This is your opportunity to make a direct impact on your investment. Your vote counts! Ways to Vote ProxyVote 800.690.6903 Important Information For holders as of March 17, 2023 Vote Common Shares by: May 10, 2023 Control Number: 0123456789012345 Vote Plan Shares by: May 8, 2023 This email represents the following share(s): NVENT ELECTRIC PLC - COMMON 123,456,789,012.00000 NVENT ELECTRIC PLC - RSIP 123,456,789,012.00000 NVENT ELECTRIC PLC - PENTAIR RSIP 123,456,789,012.00000 NVENT ELECTRIC PLC - PENTAIR DEFERRED 123,456,789,012.00000 NVENT ELECTRIC PLC - DEFERRED 123,456,789,012.00000 NVENT ELECTRIC PLC 123,456,789,012.00000 NVENT ELECTRIC PLC 123,456,789,012.00000 NVENT ELECTRIC PLC 123,456,789,012.00000 NVENT ELECTRIC PLC 123,456,789,012.00000 NVENT ELECTRIC PLC 123,456,789,012.00000

3 View documents: 10-K Report | Proxy Statement | Irish Statutory Financial Statement(s) | © 2023 Broadridge Financial Solutions Inc. P.O. Box 1310, Brentwood, NY 11717 ProxyVote and Broadridge are trademarks of Broadridge Financial Solutions Inc. CUSIP is a registered trademark of the American Bankers Association. All other registered marks belong to their respective owners. Email Settings | Terms and Conditions | Privacy Statement