LENNOX INTERNATIONAL acquisition history

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

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)

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

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)

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. 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).

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

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

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