Groowe Groowe BETA / Newsroom
⏱ News is delayed by 15 minutes. Sign in for real-time access. Sign in

Form 8-K

sec.gov

8-K — LENNOX INTERNATIONAL INC

Accession: 0001069202-26-000094

Filed: 2026-10-28

Period: 2026-10-28

CIK: 0001069202

SIC: 3585 (AIR COND & WARM AIR HEATING EQUIP & COMM & INDL REFRIG EQUIP)

Item: Results of Operations and Financial Condition

Item: Financial Statements and Exhibits

Documents

8-K — lii-20261028.htm (Primary)

EX-99.1 (lii-20260930xexx991pressre.htm)

GRAPHIC (image.jpg)

XML — IDEA: XBRL DOCUMENT (R1.htm)

8-K

8-K (Primary)

Filename: lii-20261028.htm · Sequence: 1

lii-20261028

0001069202false00010692022026-10-282026-10-28

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of report (date of earliest event reported): October 28, 2026

LENNOX INTERNATIONAL INC.

(Exact name of registrant as specified in its charter)

Delaware 001-15149 42-0991521

(State or other jurisdiction

of incorporation)

(Commission

File Number)

(IRS Employer

Identification No.)

2140 LAKE PARK BLVD.,

RICHARDSON, Texas 75080

(Address of principal executive offices, including zip code)

Registrant’s telephone number, including area code: (972)497-5000

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class

Trading Symbol(s)

Name of Each Exchange on Which Registered

Common Stock, par value $0.01 per share LII New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02    Results of Operations and Financial Condition.*

On October 28, 2026, Lennox International Inc. (the “Company”) issued a press release announcing its financial results for the third quarter of 2026. A copy of the press release is furnished as Exhibit 99.1 to this report.

Item 9.01    Financial Statements and Exhibits.

(d) Exhibits.

EXHIBIT

NUMBER

DESCRIPTION

99.1

Press release dated October 28, 2026 (furnished herewith).*

104 Inline XBRL for the cover page of this Current Report on Form 8-K.

* The information contained in Item 2.02 and Exhibit 99.1 of this report is being “furnished” with the Securities and Exchange Commission and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities under that section. Furthermore, such information shall not be deemed to be incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, unless specifically identified as being incorporated therein by reference.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

LENNOX INTERNATIONAL INC.

Date: October 28, 2026

By: /s/ Jennifer S. Perry

Name: Jennifer S. Perry

Title: Assistant Secretary

EX-99.1

EX-99.1

Filename: lii-20260930xexx991pressre.htm · Sequence: 2

Document

Exhibit 99.1

Lennox Reports 2026 Third Quarter Earnings Results

____________________________________________________________________________

Highlights

(All comparisons are year-over-year, unless otherwise noted)

•Revenue of $1.6 billion, up 10%

•GAAP Operating Income of $312 million – Total segment profit1 of $323 million, down 2%

•GAAP diluted EPS of $6.41 – Adjusted diluted EPS of $6.84, down 7%

•Updated full year adjusted EPS guidance of $21.00 to $21.50

__________________________________________________________________________________

DALLAS, October 28, 2026 – Lennox (NYSE: LII), a leader in energy-efficient building and home comfort solutions, today reported third-quarter revenue of $1.6 billion, up 10%. GAAP operating income was $312 million, with an operating margin of 19.8%. Total segment profit¹ was $323 million, down 2%, and total segment margin declined 240 basis points to 20.6%. GAAP diluted earnings per share were $6.41, and adjusted diluted earnings per share were $6.84, down 7%.

“In the third-quarter, Building Climate Solutions continued to deliver strong revenue growth and residential end-markets began stabilizing. However, our margins and results fell short of our expectations, reflecting heightened competitive pressure and the impact of persistent inflation on our costs,” said Alok Maskara, Chief Executive Officer. “We are retooling our processes to more effectively pass through cost increases while accelerating productivity. Despite the near-term challenges, we remain confident in our strategy and the long-term resilience of our business model.”

Home Comfort Solutions revenue increased 3% in the third quarter, while segment margin declined 490 basis points. Targeted price adjustments in select market segments were implemented to defend and recapture share. Those actions, combined with inflation and tariff-related costs weighed on profitability. Looking ahead, priorities include mitigating share challenges, advancing productivity and tariff mitigation initiatives, and introducing new products in the entry-tier portfolio.

Building Climate Solutions revenue increased 24% in the third quarter, including organic growth of 15%, with continued strength across commercial HVAC, refrigeration, and services. Segment margin remained strong at 26.2%, despite a 110 basis point decline from record margins in the prior-year period. Growth was fueled by business development across the segment, and we still expect full year margins to expand despite inflation and tariff pressures.

1 Includes unallocated corporate expenses

THIRD QUARTER 2026 FINANCIAL HIGHLIGHTS

(All comparisons are year-over-year, unless otherwise noted)

Revenue: $1.6 billion, up 10%, driven by organic growth in Building Climate Solutions and contributions from completed acquisitions.

Operating Income: $312 million, down 5%, with an operating margin of 19.8%, down 320 basis points.

Total Segment Profit1: $323 million, down 2%, with total segment profit margin of 20.6%, down 240 basis points. Profitability was impacted by a $45 million headwind from product cost inflation, including tariffs, and lower factory absorption. Additional pressure came from $15 million of higher fuel costs, inflation across SG&A and distribution, and ongoing investments. These headwinds were partially offset by $13 million from higher sales volumes, $21 million of mix and price benefits, and $20 million contribution from completed acquisitions.

Net Income: $221 million, or $6.41 per share, compared to $260 million, or $7.38 per share, in the prior-year quarter.

Adjusted Net Income: $236 million, or $6.84 per share, compared to $260 million, or $7.38 per share, in the prior-year quarter.

Cash Flow: Operating cash flow was $395 million compared to $301 million in the prior-year quarter, driven by reduced inventory levels. Net capital expenditure was $33 million compared to $35 million in the prior-year quarter. Share repurchases totaled $151 million.

Home Comfort Solutions: Business segment revenue was $937 million, up 3%. Segment profit was $176 million, down 18%, and segment margin was 18.7%, down 490 basis points. Profits declined $40 million versus the prior-year quarter, primarily reflecting a $12 million profit headwind from lower sales volumes. Product cost inflation, including tariffs, and lower factory absorption resulted in a $32 million headwind. Profit was further impacted by $15 million of higher fuel costs, inflation across SG&A and distribution, and ongoing investments. These pressures were partially offset by $13 million of mix and price benefits and $6 million from completed acquisitions.

Building Climate Solutions: Business segment revenue was $635 million, up 24%. Segment profit was $167 million, up $26 million or 19%, and segment margin declined 110 basis points to 26.2%. The profit increase primarily reflected $24 million from higher sales volumes, $8 million of mix and price benefits, and $13 million from completed acquisitions. These benefits were partially offset by a $14 million headwind from product cost inflation, including tariffs, and lower factory absorption. Higher SG&A and distribution costs reduced profit by an additional $5 million.

Corporate and Other: Corporate expenses were $19 million, down $8 million from the prior-year quarter.

1 Includes unallocated corporate expenses

FULL YEAR 2026 GUIDANCE

For full year 2026, we are revising the revenue growth guidance at approximately 6% growth, including 5% benefit from completed acquisitions.

Adjusted earnings per share guidance has been updated to a range of $21.00 to $21.50 compared to the prior range of $23.00 to $24.00.

Free cash flow guidance updated to $700 million to $750 million.

CONFERENCE CALL INFORMATION

A conference call to discuss the company’s 2026 third quarter results will be held this morning at 8:30 a.m. Central Time. To participate in the earnings conference, please call 800-347-6865 (U.S.) or +1 203-518-9757 (international) at least 10 minutes prior to the scheduled start time and use conference ID LIIQ326. The conference call also will be webcast live on the company’s investor relations website at investor.lennox.com. A replay of the conference call will be available until November 4, 2026, by calling toll-free 800-839-5490 (U.S.) or +1 402-220-2550 (international). The call will also be archived on the company's investor relations website at investor.lennox.com.

ABOUT LENNOX

Lennox (NYSE: LII) is a leader in energy-efficient building solutions and is committed to creating healthier and more comfortable environments. Serving residential and commercial customers, the company delivers innovative heating, cooling, indoor air quality, refrigeration, and water heating systems. Through trusted products, parts, and services, and advanced technology, Lennox delivers connected solutions that support the full lifecycle of customer needs. Additional information on Lennox is available at Lennox.com or by contacting investor@lennox.com.

FORWARD-LOOKING STATEMENTS & NON-GAAP FINANCIAL MEASURES

The statements in this document that are not historical statements, including statements regarding the 2026 full-year outlook and expected consolidated and segment financial results, as well as financial targets for future years, are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These forward-looking statements are based on information currently available as well as management’s assumptions and beliefs today. These statements are subject to numerous risks and uncertainties that could cause actual results to differ materially from the results expressed or implied by the statements, and investors should not place undue reliance on them. Risks and uncertainties that could cause actual results to differ materially from such statements include risks that the North American HVAC and refrigeration markets perform worse than current assumptions. Additional risks include but are not limited to competition in the HVACR business; our ability to successfully develop and market new products or execute our business strategy; our ability to meet and anticipate customer demands; our ability to continue to license or enforce our intellectual property rights; our ability to attract, motivate, develop, and retain our employees, as well as labor relations problems; artificial intelligence technologies; a decline in new construction activity and related demand for our products and services; the impact of weather on our business; the impact of higher raw material prices and significant supply interruptions; product liability, warranty claims, or recalls; changes in environmental and climate-related legislation or government regulations or policies; changes in tax legislation; the impact of new or increased trade tariffs; improper conduct by any of our employees, agents, or business partners; litigation risks; general economic conditions in the United States and abroad; extraordinary events beyond our control; risks associated with our international operations; cyber-attacks and other disruptions or misuse of information systems; and our ability to successfully realize, complete and integrate acquisitions, including the acquisitions of Duro Dyne, Supco, and Heat Controller.

For information concerning these and other risks and uncertainties, see LII’s publicly available filings with the Securities and Exchange Commission. LII disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

A reconciliation of non-GAAP financial measures appearing in this document to financial measures prepared in accordance with U.S. Generally Accepted Accounting Principles (GAAP) are included in the Annex to this document.

This document includes forward-looking statements regarding segment profit, adjusted net income, adjusted diluted earnings per share, and free cash flow, which are non-GAAP financial measures. These non-GAAP financial measures are derived by excluding certain amounts from the corresponding financial measures determined in accordance with GAAP. The determination of the amounts excluded is a matter of management judgment and depends upon, among other factors, the nature of the underlying expense or income amounts recognized in a given period and the high variability of certain amounts, such as unusual gains and losses, the ultimate outcome of pending litigation, fluctuations in foreign currency exchange rates, changes in environmental liabilities, the impact and timing of potential acquisitions and divestitures, future restructuring costs, and other structural changes or

their probable significance. We are unable to present a quantitative reconciliation of the aforementioned forward-looking non-GAAP financial measures to their most directly comparable forward-looking GAAP financial measures because such information is not available, and management cannot reliably predict the necessary components of such GAAP measures without unreasonable effort or expense. The unavailable information could have a significant impact on LII’s full year GAAP financial results.

LENNOX INTERNATIONAL INC. AND SUBSIDIARIES

Consolidated Statements of Operations

(Unaudited)

(Amounts in millions, except per share data) For the Three Months Ended September 30, For the Nine Months Ended September 30,

2026 2025 2026 2025

Net sales $ 1,572.5  $ 1,426.8  $ 4,252.9  $ 4,000.3

Cost of goods sold 1,075.3  939.6  2,864.9  2,654.7

Gross profit 497.2  487.2  1,388.0  1,345.6

Operating Expenses:

Selling, general and administrative expenses 177.3  161.6  545.6  506.2

Losses (gains) and other expenses, net 4.8  (0.7) 9.4  (0.6)

Restructuring charges 8.2  —  8.2  —

Gain on sale from previous dispositions (3.8) —  (3.8) —

Income from equity method investments (1.4) (2.5) (2.0) (5.8)

Operating income 312.1  328.8  830.6  845.8

Pension settlements —  0.1  0.6  0.3

Interest expense, net 17.5  10.5  47.4  25.0

Other expense, net 1.3  0.8  2.8  2.3

Net income before income taxes 293.3  317.4  779.8  818.2

Provision for income taxes 72.1  57.5  172.4  154.8

Net income $ 221.2  $ 259.9  $ 607.4  $ 663.4

Earnings per share – Basic(1):

$ 6.43  $ 7.41  $ 17.54  $ 18.78

Earnings per share – Diluted(1):

$ 6.41  $ 7.38  $ 17.47  $ 18.70

Weighted Average Number of Shares Outstanding - Basic 34.4  35.1  34.6  35.3

Weighted Average Number of Shares Outstanding - Diluted 34.5  35.2  34.8  35.5

(1) Amounts may not recalculate due to rounding.

Note: The 2025 amounts are adjusted to reflect the accounting method change from LIFO to FIFO that occurred in the fourth quarter of 2025.

LENNOX INTERNATIONAL INC. AND SUBSIDIARIES

Segment Net Sales and Profit

(Unaudited)

(Amounts in millions)

For the Three Months Ended September 30,

For the Nine Months Ended September 30,

2026

2025

2026

2025

Net Sales

Home Comfort Solutions $ 937.2  $ 912.9  $ 2,522.8  $ 2,643.6

Building Climate Solutions 635.3  513.9  1,730.1  1,356.7

Total net sales $ 1,572.5  $ 1,426.8  $ 4,252.9  $ 4,000.3

Segment Profit(1)

Home Comfort Solutions $ 175.7  $ 215.3  $ 484.0  $ 591.2

Building Climate Solutions 166.5  140.3  417.4  319.7

Total segment profit 342.2  355.6  901.4  910.9

Corporate and other expenses(3)

(18.9) (26.8) (59.6) (65.1)

Total segment profit, including unallocated Corporate and other expenses 323.3  328.8  841.8  845.8

Reconciliation to Operating income:

Restructuring charges 8.2  —  8.2  —

Gain on sale from previous dispositions (3.8) —  (3.8) —

Special litigation charges(2)

3.0  —  3.0  —

Acquisition costs(2)

3.8  —  3.8  —

Operating income $ 312.1  $ 328.8  $ 830.6  $ 845.8

(1) We define segment profit as a segment's operating income (loss) included in the accompanying Consolidated Statements of Operations, excluding:

•Restructuring charges,

•Gain on sale of previous dispositions,

•Special litigation charges, and;

•Acquisition costs

(2) Recorded in Losses (gains) and other expenses, net in the accompanying Consolidated Statement of Operations.

(3) Corporate and other expenses include unallocated corporate costs related to corporate administrative functions such as tax, treasury, accounting, internal audit, legal and human resources.

Note: The 2025 amounts are adjusted to reflect the accounting method change from LIFO to FIFO that occurred in the fourth quarter of 2025.

LENNOX INTERNATIONAL INC. AND SUBSIDIARIES

Consolidated Balance Sheets

(Amounts in millions, except shares and par values) As of September 30, 2026 As of December 31, 2025

(Unaudited)

ASSETS

Current Assets:

Cash and cash equivalents $ 43.3  $ 34.2

Short-term investments 2.2  0.5

Accounts and notes receivable, net of allowances of $8.0 and $8.5 in 2026 and 2025, respectively

881.3  578.8

Inventories, net 1,176.8  1,152.6

Other current assets 121.9  137.7

Total current assets 2,225.5  1,903.8

Restricted cash equivalents 22.4  18.5

Property, plant and equipment, net of accumulated depreciation of $1,106.1 and $1,043.9 in 2026 and 2025, respectively

937.0  887.2

Right-of-use assets from operating leases 429.5  356.3

Goodwill 590.3  497.2

Intangible assets, net of accumulated amortization of $52.0 and $38.3 in 2026 and 2025, respectively

336.5  273.0

Deferred income taxes 12.3  12.9

Other assets, net 135.8  132.9

Total assets $ 4,689.3  $ 4,081.8

LIABILITIES AND STOCKHOLDERS’ EQUITY

Current Liabilities:

Accounts payable $ 550.6  $ 438.0

Accrued expenses 418.4  374.2

Income taxes payable 5.6  46.4

Commercial paper 455.1  226.0

Current maturities of long-term debt 319.2  18.3

Current operating lease liabilities 87.3  88.9

Total current liabilities 1,836.2  1,191.8

Long-term debt 847.1  1,144.1

Long-term operating lease liabilities 375.9  293.4

Pensions 20.8  18.7

Other liabilities 292.4  270.7

Total liabilities 3,372.4  2,918.7

Commitments and contingencies

Stockholders' equity:

Preferred stock, $0.01 par value, 25,000,000 shares authorized, no shares issued or outstanding

—  —

Common stock, $0.01 par value, 200,000,000 shares authorized, 87,170,197 shares issued

0.9  0.9

Additional paid-in capital 1,262.3  1,243.0

Retained earnings 5,361.9  4,891.1

Accumulated other comprehensive loss (71.4) (48.5)

Treasury stock, at cost, 52,962,480 shares and 52,374,147 shares for 2026 and 2025, respectively

(5,236.8) (4,923.4)

Total stockholders' equity 1,316.9  1,163.1

Total liabilities and stockholders' equity $ 4,689.3  $ 4,081.8

LENNOX INTERNATIONAL INC. AND SUBSIDIARIES

Consolidated Statements of Cash Flows

(Unaudited)

(Amounts in millions) For the Nine Months Ended September 30,

2026 2025

Cash flows from operating activities:

Net income $ 607.4  $ 663.4

Adjustments to reconcile net income to net cash provided by operating activities:

Gain on sale from previous dispositions (3.8) —

Income from equity method investments (2.0) (5.8)

Dividends from affiliates 4.9  6.1

Restructuring charges, net of cash paid 7.3  —

Provision for credit losses (gains) 3.7  (1.8)

Unrealized losses, net on derivative contracts 4.4  2.3

Stock-based compensation expense 15.4  21.2

Depreciation and amortization 96.4  79.4

Deferred income taxes 9.1  28.5

Pension expense 2.9  3.2

Pension contributions (0.7) (6.1)

Changes in assets and liabilities, net of effects of acquisitions and divestitures:

Accounts and notes receivable (289.2) (94.7)

Inventories 26.2  (310.2)

Other current assets 4.3  (7.0)

Accounts payable 94.0  (16.7)

Accrued expenses 27.4  (37.3)

Income taxes payable and receivable, net (40.7) 27.7

Leases, net 7.7  5.2

Other, net 8.7  (5.7)

Net cash provided by operating activities 583.4  351.7

Cash flows from investing activities:

Proceeds from the disposal of property, plant and equipment 2.0  1.1

Purchases of property, plant and equipment (124.4) (89.6)

Acquisitions, net of cash (209.9) —

(Purchases of) proceeds from investments and other (1.8) 0.9

Net cash used in investing activities (334.1) (87.6)

Cash flows from financing activities:

Commercial paper borrowings 1,311.0  677.1

Commercial paper payments (1,081.9) (520.1)

Payments on debt arrangements (17.6) (14.2)

Payment of senior unsecured notes —  (300.0)

Borrowings from credit facility 280.0  —

Payments on credit facility (280.0) —

Payments of deferred financing costs —  (1.7)

Proceeds from employee stock purchases 5.8  4.0

Repurchases of common stock (301.9) (331.8)

Repurchases of common stock to satisfy employee withholding tax obligations (11.5) (13.3)

Cash dividends paid (137.5) (127.4)

Net cash used in financing activities (233.6) (627.4)

Increase (decrease) in cash, cash equivalents and restricted cash 15.7  (363.3)

Effect of exchange rates on cash, cash equivalents and restricted cash equivalents (2.7) 1.1

Cash, cash equivalents and restricted cash, beginning of period 52.7  415.1

Cash, cash equivalents and restricted cash, end of period $ 65.7  $ 52.9

Supplemental disclosures of cash flow information:

Interest paid $ 57.4  $ 39.7

Income taxes paid (net of refunds) $ 198.2  $ 91.5

Note: The 2025 amounts are adjusted to reflect the accounting method change from LIFO to FIFO that occurred in the fourth quarter of 2025.

LENNOX INTERNATIONAL INC. AND SUBSIDIARIES

Reconciliation to U.S. GAAP (Generally Accepted Accounting Principles) Measures

(Unaudited, in millions, except per share and ratio data)

Use of Non-GAAP Financial Measures

To supplement the Company's consolidated financial statements and segment net sales and profit (loss) presented in accordance with U.S. GAAP, additional non-GAAP financial measures are provided and reconciled in the following tables. The Company believes that these non-GAAP financial measures, when considered together with the GAAP financial measures, provide information that is useful to investors in understanding period-over-period operating results and enhance the ability of investors to analyze the Company's business trends and operating performance.

Reconciliation of Net income, a GAAP measure, to Adjusted net income, a Non-GAAP measure

For the Three Months Ended September 30, For the Nine Months Ended September 30,

2026 2025 2026 2025

Amount after tax Per Diluted Share Amount after tax Per Diluted Share Amount after tax Per Diluted Share Amount after tax Per Diluted Share

Net income, a GAAP measure $ 221.2  $ 6.41  $ 259.9  $ 7.38  $ 607.4  $ 17.47  $ 663.4  $ 18.70

Restructuring charges 6.4  0.19  —  —  6.4  0.19  —  —

Gain on sale from previous dispositions (3.0) (0.09) —  —  (3.0) (0.09) —  —

Special litigation charges (a) 2.7  0.08  —  —  2.7  0.08  —  —

Acquisition costs (a) 8.6  0.25  —  —  8.6  0.24  —  —

Adjusted net income, a non-GAAP measure $ 235.9  $ 6.84  $ 259.9  $ 7.38  $ 622.1  $ 17.89  $ 663.4  $ 18.70

(a) Recorded in Losses (gains) and other expenses, net in the Consolidated Statements of Operations

Note: The 2025 amounts are adjusted to reflect the accounting method change from LIFO to FIFO that occurred in the fourth quarter of 2025.

Reconciliation of Net Cash Provided by Operating Activities, a GAAP measure, to Free Cash Flow, a Non-GAAP measure

For the Three Months Ended September 30, For the Nine Months Ended September 30,

2026 2025 2026 2025

Net cash provided by operating activities $ 395.3  $ 300.7  $ 583.4  $ 351.7

Purchases of property, plant and equipment (33.2) (35.6) (124.4) (89.6)

Proceeds from the disposal of property, plant and equipment 0.6  0.2  2.0  1.1

Free cash flow, a Non-GAAP measure $ 362.7  $ 265.3  $ 461.0  $ 263.2

GRAPHIC

GRAPHIC

Filename: image.jpg · Sequence: 6

Binary file (6435 bytes)

Download image.jpg

XML — IDEA: XBRL DOCUMENT

XML

Filename: R1.htm · Sequence: 8

v3.26.3

Document and Entity Information Document and Entity Information

Oct. 28, 2026

Cover [Abstract]

Entity Central Index Key

0001069202

Entity Incorporation, State or Country Code

DE

Title of 12(b) Security

Common Stock, par value $0.01 per share

Trading Symbol

LII

Security Exchange Name

NYSE

Pre-commencement Issuer Tender Offer

false

Pre-commencement Tender Offer

false

Soliciting Material

false

Written Communications

false

Document Type

8-K

Entity Registrant Name

LENNOX INTERNATIONAL INC

Entity Address, Address Line One

2140 LAKE PARK BLVD

Entity Address, City or Town

RICHARDSON

Entity Address, Postal Zip Code

75080

Entity File Number

001-15149

Entity Tax Identification Number

42-0991521

City Area Code

972

Local Phone Number

497-5000

Amendment Flag

false

Entity Emerging Growth Company

false

Entity Address, State or Province

TX

Document Period End Date

Oct. 28, 2026

X

- Definition

Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.

+ References

No definition available.

+ Details

Name:

dei_AmendmentFlag

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Area code of city

+ References

No definition available.

+ Details

Name:

dei_CityAreaCode

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Cover page.

+ References

No definition available.

+ Details

Name:

dei_CoverAbstract

Namespace Prefix:

dei_

Data Type:

xbrli:stringItemType

Balance Type:

na

Period Type:

duration

X

- Definition

For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.

+ References

No definition available.

+ Details

Name:

dei_DocumentPeriodEndDate

Namespace Prefix:

dei_

Data Type:

xbrli:dateItemType

Balance Type:

na

Period Type:

duration

X

- Definition

The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.

+ References

No definition available.

+ Details

Name:

dei_DocumentType

Namespace Prefix:

dei_

Data Type:

dei:submissionTypeItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Address Line 1 such as Attn, Building Name, Street Name

+ References

No definition available.

+ Details

Name:

dei_EntityAddressAddressLine1

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Name of the City or Town

+ References

No definition available.

+ Details

Name:

dei_EntityAddressCityOrTown

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Code for the postal or zip code

+ References

No definition available.

+ Details

Name:

dei_EntityAddressPostalZipCode

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Name of the state or province.

+ References

No definition available.

+ Details

Name:

dei_EntityAddressStateOrProvince

Namespace Prefix:

dei_

Data Type:

dei:stateOrProvinceItemType

Balance Type:

na

Period Type:

duration

X

- Definition

A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityCentralIndexKey

Namespace Prefix:

dei_

Data Type:

dei:centralIndexKeyItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Indicate if registrant meets the emerging growth company criteria.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityEmergingGrowthCompany

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.

+ References

No definition available.

+ Details

Name:

dei_EntityFileNumber

Namespace Prefix:

dei_

Data Type:

dei:fileNumberItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Two-character EDGAR code representing the state or country of incorporation.

+ References

No definition available.

+ Details

Name:

dei_EntityIncorporationStateCountryCode

Namespace Prefix:

dei_

Data Type:

dei:edgarStateCountryItemType

Balance Type:

na

Period Type:

duration

X

- Definition

The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityRegistrantName

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

na

Period Type:

duration

X

- Definition

The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityTaxIdentificationNumber

Namespace Prefix:

dei_

Data Type:

dei:employerIdItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Local phone number for entity.

+ References

No definition available.

+ Details

Name:

dei_LocalPhoneNumber

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 13e

-Subsection 4c

+ Details

Name:

dei_PreCommencementIssuerTenderOffer

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 14d

-Subsection 2b

+ Details

Name:

dei_PreCommencementTenderOffer

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Title of a 12(b) registered security.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b

+ Details

Name:

dei_Security12bTitle

Namespace Prefix:

dei_

Data Type:

dei:securityTitleItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Name of the Exchange on which a security is registered.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection d1-1

+ Details

Name:

dei_SecurityExchangeName

Namespace Prefix:

dei_

Data Type:

dei:edgarExchangeCodeItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 14a

-Subsection 12

+ Details

Name:

dei_SolicitingMaterial

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Trading symbol of an instrument as listed on an exchange.

+ References

No definition available.

+ Details

Name:

dei_TradingSymbol

Namespace Prefix:

dei_

Data Type:

dei:tradingSymbolItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Securities Act

-Number 230

-Section 425

+ Details

Name:

dei_WrittenCommunications

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

na

Period Type:

duration