M&A Acquirer Playbook

LENNOX INTERNATIONAL INC acquisition history.

Every deal, price, and strategic rationale.

Company LENNOX INTERNATIONAL INC

SEC CIK 0001069202

Tracked filings EDGAR · 8-K

Total deals tracked

Disclosed 8-K acquisitions, 1999 — present.

Aggregate disclosed value

$1.01B

approximately $1.01 billion across four disclosed acquisitions — Duro Dyne & Supco ($545M), Service Experts ($307M), AES ($94.9M), and Kirby ($65.5M).

Active acquisition years

1999 · 2000 · 2023 · 2025

a deliberate, infrequent acquirer that grows mostly organically and through joint ventures.

Primary sectors

HVAC and refrigeration

direct-to-consumer service (Service Experts), light-commercial services (AES), parts and supplies (Duro Dyne, Supco), and commercial refrigeration (Kirby).

Verified 4 deals on this page · sourced from SEC filings + 2 earnings transcripts

All cross-references covered.

Timeline

4 deals, $1.01B deployed.

Plotted by close date where disclosed, otherwise announcement. Click any marker to jump to the deal entry.

The playbook

The rationale that repeats.

Three patterns show up across LENNOX INTERNATIONAL's deal book — what the team buys, how it pays, and how it integrates. The patterns are the throughline; the individual deals below are the evidence.

Acquisition criteria

Infrequent, deliberate dealmaker.

Lennox is an organic-growth HVAC manufacturer that acquires sparingly — only four named acquisitions of scale across more than two decades as a public company. Between deals it leans on joint ventures (the Samsung and Ariston JVs, plus a long-standing Mexican refrigeration JV and a compressor JV) and on divestitures, including the sale of its European businesses, to reshape the portfolio rather than M&A.

Duro Dyne and Supco (NSI Industries HVAC Division)AES (AES Industries, Inc. and AES Mechanical Service Group, Inc.)Service Experts Inc.James N. Kirby Pty. Ltd.

Capital deployment

Buying the full HVAC life cycle.

The modern deals move Lennox beyond equipment into services, parts and supplies. AES (2023) added light-commercial installation, curbs and reclaim services so Lennox could sell "front-to-back" life-cycle services; Duro Dyne and Supco (2025) added a parts-and-supplies portfolio to accelerate attachment across both the Home Comfort Solutions and Building Climate Solutions segments. CEO Alok Maskara framed Duro Dyne and Supco as enhancing Lennox's ability to support customers "throughout the entire HVAC value chain."

Duro Dyne and Supco (NSI Industries HVAC Division)AES (AES Industries, Inc. and AES Mechanical Service Group, Inc.)Service Experts Inc.James N. Kirby Pty. Ltd.

Integration approach

Disciplined, accretive, segment-aligned.

Each acquisition is sized to a specific segment and screened against return discipline. Management described Duro Dyne and Supco — roughly $225 million in annual revenue — as meeting its "discipline criteria" and expected to be accretive in 2026, while AES was a deliberate light-commercial services tuck-in. The early deals (Kirby, Service Experts) were larger bets on commercial refrigeration and direct-to-consumer retail, and Lennox later restructured or exited the parts that under-performed.

Duro Dyne and Supco (NSI Industries HVAC Division)AES (AES Industries, Inc. and AES Mechanical Service Group, Inc.)Service Experts Inc.James N. Kirby Pty. Ltd.

Deal book · 4 acquisitions

The full deal book.

4 acquisitions. Click any row to see the deal value, financing structure, target revenue, executive commentary, and the original SEC filing — the evidence behind the patterns above.

Lennox acquired 100% of the outstanding common stock of Duro Dyne Buyer, Inc. and Sealed Unit Parts Buyer, Inc. — the HVAC division of NSI Industries, comprising the Duro Dyne, Dyna-Tite, DuroZone, Supco and LINEBACKER brands. The businesses manufacture and sell a portfolio of HVAC parts and supplies that complement Lennox's residential and commercial offerings, such as air distribution accessories, switches and controls, and other engineered components and accessories with HVACR applications. Duro Dyne is reported in the Business Climate Solutions segment; Supco in the Home Comfort Solutions segment.

Why it was attractive

01 Parts and supplies carry higher margins and recurring attachment to Lennox's installed base
02 and the deal added recognized brands (Duro Dyne
03 Supco
04 Dyna-Tite
05 DuroZone) across both operating segments

Capabilities acquired

air distribution accessoriesswitches and controlsengineered HVACR components and accessoriesreplacement parts and supplies

This acquisition enhances our ability to support residential and commercial customers throughout the entire HVAC value chain.

Alok Maskara Chief Executive Officer, Lennox International

The recent DuroDyne and Supco acquisition strengthens our parts and accessories portfolio, positioning us for greater success during the more normalized operating environment expected in 2026 and beyond.

Alok Maskara Chief Executive Officer, Lennox International (Q3 2025 results release)

Post-close · earnings-call commentary

Alok Maskara, Q3 2025 earnings call: "the recent acquisition of Durodyne and Supco will help accelerate attachment of parts and accessories across both HCS and BCS segments. The acquired business has annual revenues of approximately $225 million and a solid growth trajectory with strong margins. This acquisition meets our discipline criteria and will be accretive in 2026."

Deal value

$545M

approximately $545 million (cash consideration paid, per FY2025 10-K)

Terms

AnnouncedOct 2025

ClosedOct 2025

StructureFull acquisition

Considerationall cash

Financials

Target revenue / EBITDAapproximately $225 million in annual revenue (per management commentary on the Q3 2025 earnings call)

Cash impact / synergiesAccelerates attachment of parts and accessories across both Home Comfort Solutions and Building Climate Solutions; management indicated the deal would be accretive in 2026.

Deal facts

GeographyUnited States (NSI Industries HVAC division)

SegmentBuilding Climate Solutions (Duro Dyne) and Home Comfort Solutions (Supco)

Integration unitDuro Dyne reported within Building Climate Solutions; Supco within Home Comfort Solutions

Integration timelineClosed in the fourth quarter of 2025; management expected the transaction to be accretive in 2026. Per the FY2025 10-K, the acquired businesses contributed approximately $42 million of net sales from the acquisition date through December 31, 2025.

Fundingall cash.

SEC 8-K · Duro Dyne and Supco (NSI Industries HVAC Division)

Lennox Q3 2025 earnings call (Oct 22, 2025)

Lennox acquired AES Industries, Inc. and AES Mechanical Service Group, Inc. (collectively "AES"), a company dedicated to service and sustainability in the light commercial HVAC market across North America. AES provides installation services, adapter curbs, and reclaim/recycle services, and is one of the larger manufacturers of roof curbs and diffuser systems serving the U.S. light commercial market. The acquisition was reported within Lennox's Building Climate Solutions segment.

Why it was attractive

01 AES added installed-base service
02 curbs and reclaim capabilities that let Lennox sell integrated life-cycle services to commercial customers

Capabilities acquired

light commercial HVAC installation servicesadapter/roof curbsreclaim and recycling servicessustainability services

AES represents a strong strategic and cultural fit for the Lennox Commercial segment and is consistent with our growth strategy.

Joe Nassab EVP and President of the Commercial Heating and Cooling Business, Lennox International

Company announced the acquisition of AES to expand Lennox commercial HVAC services.

Lennox Q3 2023 results release (Oct 26 2023)

Post-close · earnings-call commentary

Alok Maskara, Q4 2023 earnings call: "We also simplified our portfolio with the sale of the European businesses and improved our total life cycle value proposition with the recent AES acquisition."

Deal value

$94.9M

approximately $94.9 million (total consideration, net of cash acquired, per FY2023 10-K)

Terms

AnnouncedOct 2023

ClosedOct 2023

StructureFull acquisition

Considerationall cash

Financials

Target revenue / EBITDAapproximately $13 million of net sales recognized from the acquisition date through December 31, 2023 (per FY2023 10-K)

Cash impact / synergiesEnabled delivery of front-to-back life-cycle integrated services to AES and Lennox commercial customers.

Deal facts

GeographyNorth America (United States)

SegmentBuilding Climate Solutions (then reported within the Commercial segment)

Integration unitBuilding Climate Solutions segment (Lennox Commercial); AES President Jason Benton joined Lennox Commercial in a leadership role

Integration timelineCompleted in the fourth quarter of 2023; a final working capital adjustment was completed in the first quarter of 2024, with $40.4 million of goodwill recorded.

Fundingall cash.

SEC 8-K · AES (AES Industries

Lennox Q4 2023 earnings call (Feb 2024)

On January 21, 2000, Lennox acquired Service Experts Inc., a holding company owning retail outlets for heating and air conditioning products and services across the United States. The acquisition took the form of a merger in which Service Experts shareholders received 0.67 of a share of LII common stock per share. Approximately $154.6 million was allocated to the fair value of assets acquired, $118.8 million to liabilities assumed, and $271.5 million to goodwill. Service Experts greatly expanded Lennox's program of selling HVAC products and services directly to consumers.

Why it was attractive

01 Service Experts gave Lennox a direct-to-consumer retail footprint of company-owned dealer service centers
02 complementing its manufacturing and wholesale distribution

Capabilities acquired

retail HVAC dealer service centersdirect-to-consumer heating and cooling installation and service

On January 21, 2000, the Company acquired Service Experts Inc., a holding company owning retail outlets for heating and air conditioning products and services. The acquisition was accounted for under the purchase method of accounting.

Lennox International FY2002 10-K Acquisitions and Divestitures note

Deal value

$307.0M

approximately $307.0 million, including 12.2 million shares of LII common stock and the assumption of $175 million of debt (per FY2002 10-K, Note 6)

Terms

AnnouncedJan 2000

ClosedJan 2000

StructureMerger

Considerationcombination

Financials

Cash impact / synergiesIntegrated Service Experts centers with the dealer service centers Lennox had acquired since 1998 to build a North American retail segment.

Deal facts

GeographyUnited States

SegmentNorth American retail / Service Experts

Integration unitNorth American retail segment (Service Experts operations)

Integration timelineClosed January 21, 2000; results consolidated from the acquisition date. Lennox later restructured under-performing centers and ultimately exited the Service Experts retail business.

Not disclosed in filing Target revenue / EBITDA

Fundingcombination (stock plus assumption of debt).

SEC 8-K · Service Experts Inc.

In June 1999, Lennox acquired the outstanding stock of James N. Kirby Pty. Ltd. ("Kirby"), an Australian company that manufactures and distributes commercial refrigeration and heat transfer products and participates in those markets in Australia. The purchase price was approximately $65.5 million.

Why it was attractive

01 Kirby added refrigeration and heat-transfer manufacturing and an established Australian distribution network to Lennox's commercial refrigeration business

Capabilities acquired

commercial refrigeration manufacturingheat transfer productsAustralian distribution

In June 1999, the Company acquired the outstanding stock of James N. Kirby Pty. Ltd. ("Kirby"), an Australian manufacturer and distributor of refrigeration and heat transfer products. The purchase price of $65.5 million was paid in cash.

Lennox International FY2001 10-K Acquisitions note

Deal value

$65.5M

approximately $65.5 million (per FY2001 10-K, Note 6)

Terms

AnnouncedJun 1999

ClosedJun 1999

StructureFull acquisition

Considerationall cash

Financials

Target revenue / EBITDAcontributed approximately $27.5 million to the year-over-year increase in North American commercial refrigeration sales in 2000 (per FY2001 10-K)

Cash impact / synergiesBroadened Lennox's commercial refrigeration and heat transfer reach in the Asia-Pacific region.

Deal facts

GeographyAustralia

SegmentCommercial refrigeration / heat transfer (International)

Integration unitCommercial refrigeration / heat transfer segment

Integration timelineClosed June 1999; results consolidated from the date of acquisition.

Fundingall cash.

SEC 8-K · James N. Kirby Pty. Ltd.

End of deal book

4 acquisitions · $1.01B deployed ·1999 — present

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4 deals, $1.01B deployed.

The rationale that repeats.

Infrequent, deliberate dealmaker.

Buying the full HVAC life cycle.

Disciplined, accretive, segment-aligned.

The full deal book.

Put VectorShift to workon every deal.

Put VectorShift to work
on every deal.