UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

(Amendment No.     )

Filed by the Registrant  ☒                             Filed by a party other than the Registrant  ☐

Check the appropriate box:

☐	Preliminary Proxy Statement
☐	Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))
☐	Definitive Proxy Statement
☒	Definitive Additional Materials
☐	Soliciting Material Pursuant to §240.14a-12

LENNOX INTERNATIONAL INC.

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if Other Than The Registrant)

Payment of Filing Fee (Check the appropriate box):

☒	No fee required.
☐	Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.
	(1)	Title of each class of securities to which transaction applies:
	(2)	Aggregate number of securities to which transaction applies:
	(3)	Per unit price or other underlying value of transaction computed pursuant to Exchange Act Rule 0-11 (set forth the amount on which the filing fee is calculated and state how it was determined):
	(4)	Proposed maximum aggregate value of transaction:
	(5)	Total fee paid:
☐	Fee paid previously with preliminary materials.
☐	Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid previously. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.
	(1)	Amount Previously Paid:
	(2)	Form, Schedule or Registration Statement No.:
	(3)	Filing Party:
	(4)	Date Filed:

Important Notice Regarding the Availability of Proxy Materials for the Shareholder Meeting to be held on May 16, 2018, for Lennox International Inc. This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. We encourage you to access and review all of the important information contained in the proxy materials before voting. To view the proxy statement and annual report, go to www.proxydocs.com/LII. To submit your proxy while visiting this site, you will need the 12 digit control number in the box below. Under new United States Securities and Exchange Commission rules, proxy materials do not have to be delivered in paper. Proxy materials can be distributed by making them available on the Internet. We have chosen to use these procedures for our 2018 Annual Meeting and need YOUR participation. If you want to receive a paper or e-mailcopy of the proxy materials, you must request one. There is no charge to you for requesting a copy. In order to receive a paperpackage in time for this year’s annual meeting, please make this request on or before May 4, 2018. Printed materials may berequested by one of the following methods: INTERNET www.investorelections.com/LII You must use the 12 digit control number located in the shaded gray box below. TELEPHONE (866) 648-8133 *E-MAIL paper@investorelections.com * If requesting material by e-mail, please send a blank e-mail with the 12 digit control number (located below) in the subject line. Noother requests, instructions or other inquiries should be included with your e-mail requesting material. ACCOUNT NO. SHARES The purpose of the Annual Meeting is to take action on the following proposals: The Board of Directors recommends that you vote“FOR” the following. 1. Election of Directors Nominees 01 John E. Major 02 Gregory T. Swienton 03 Todd J. Teske The Board of Directors recommends you vote FOR the following proposal(s): 2. Ratifying the appointment of KPMG LLP as our independentregistered public accounting firm for the 2018 fiscal year. 3. Advisory vote to approve the compensation of the namedexecutive officers as disclosed in our proxy statement. NOTE: Such other business as may properly come before the meeting or any adjournment thereof. Date: Wednesday, May 16, 2018 Time: 10:30 A.M. Central Time Place: 2140 Lake Park Boulevard,Richardson, TX 75080 Lennox International Inc. Notice of Annual Meeting Proxy Materials Available to View or Receive: 1. Proxy Statement 2. Annual Report For a Convenient Way to View Proxy Materials and _ VOTE Online go to: www.proxydocs.com/LII