☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the transition period from _____to ______Commission File Number 001-15149LENNOX INTERNATIONAL INC. (Exact name of Registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification Number) 2140 Lake Park Blvd. Richardson, Texas 75080(Address of principal executive offices, including zip code)(Registrant’s telephone number, including area code):(972) 497-5000Securities Registered Pursuant to Section 12(b) of the Act:Title of each classTrading Symbol(s)Name of each exchange on which registeredCommon stock, $0.01 par value per shareLIINew York Stock Exchange Securities Registered Pursuant to Section 12(g) of the Act: None Indicate by checkmark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.Yes [X] No [ ] Indicate by checkmark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Exchange Act.Yes [ ] No [X] Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Exchange Act duringthe preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filingrequirements for the last 90 days.Yes [X] No [ ] Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant toRule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was requiredto submit such files). Yes [X] No [ ] Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reportingcompany, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and“emerging growth company” in Rule 12b-2 of the Exchange Act. Large Accelerated Filer[X]Accelerated Filer[ ]Non-Accelerated Filer[ ]Smaller Reporting Company[ ]Emerging Growth Company[ ] If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period forcomplying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. [ ] Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of itsinternal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accountingfirm that prepared or issued its audit report Yes☒No☐ If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrantincluded in the filing reflect the correction of an error to previously issued financial statements.☐ Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-basedcompensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b).☐ Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).Yes☐Nox As of June 30, 2024, the aggregate market value of the common stock held by non-affiliates of the registrant was approximately $17.1 billionbased on the closing price of the registrant’s common stock on the New York Stock Exchange.As of February 4, 2025, there were 35,579,664shares of the registrant’s common stock outstanding. DOCUMENTS INCORPORATED BY REFERENCE Portions of the registrant’s 2025 Definitive Proxy Statement to be filed with the Securities and Exchange Commission in connection with theregistrant’s 2025 Annual Meeting of Stockholders to be held on May 22, 2025 are incorporated by reference into Part III of this report. LENNOX INTERNATIONAL INC.FORM 10-KFor the Fiscal Year Ended December 31, 2024 ITEM 1.Business1ITEM 1A.Risk Factors8ITEM 1B.Unresolved Staff Comments14ITEM 1C.Cybersecurity15ITEM 2.Properties16ITEM 3.Legal Proceedings17ITEM 4.Mine Safety Disclosures17 PART IIITEM 5.Market for Registrant's Common Equity, Related Stockholder Matters and IssuerPurchases of Equity Securities17ITEM 6.Reserved18ITEM 7.Management's Discussion and Analysis of Financial Condition and Results ofOperations18ITEM 7A.Quantitative and Qualitative Disclosures about Market Risk31ITEM 8.Financial Statements and Supplementary Data32ITEM 9.Changes in and Disagreements With Accountants on Accounting and FinancialDisclosure77ITEM 9A.Controls and Procedures77ITEM 9B.Other Information77ITEM 9C.Disclosure Regarding Foreign Jurisdictions that Prevent Inspections77 PART IIIITEM 10.Directors, Executive Officers and Corporate Governance78ITEM 11.Execu