Rooftop HVAC equipment at sunset with a technician inspecting controls beside large chillers.

The History of Carrier: From Engineering Origins to Climate Systems

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Carrier’s history began with an industrial problem, not a consumer cooling product. In 1902, Willis H. Carrier’s work at Buffalo Forge produced a system that became foundational to modern air conditioning.

The company came later. Carrier Engineering Corporation was incorporated in 1915, then evolved through merger, decades under United Technologies Corporation, a 2020 return to independence, and a recent portfolio shift toward climate and energy technologies.

A Quick Look at the History of Carrier

Company History Summary

Carrier traces its technological roots to Willis Carrier’s 1902 air-conditioning work and its corporate origin to Carrier Engineering Corporation in 1915. The business became Carrier Corporation through the 1930-1931 merger and reorganization, joined United Technologies in 1979, and became independent Carrier Global Corporation in 2020. Since 2023, management has concentrated the portfolio more heavily around climate and energy solutions.

Company Snapshot

Technological Origin: 1902, when Willis Carrier developed a foundational air-conditioning system while working for Buffalo Forge.

Corporate Origin: June 26, 1915, when Carrier Engineering Corporation was incorporated.

Founders: Willis Carrier, J. Irvine Lyle, and fellow engineers.

Original Name: Carrier Engineering Corporation.

Current Company: Carrier Global Corporation, an independent public company listed on the New York Stock Exchange under CARR.

Current Leadership: David L. Gitlin, Chairman and Chief Executive Officer as of October 5, 2026.

Current Business Areas: Climate systems, heat pumps, energy-related technologies, transport refrigeration and monitoring, controls, and intelligent-building systems.

Best Known For: Air-conditioning technology and the climate-control business that developed from Willis Carrier’s early engineering work.

The Engineering Problem That Came Before the Company

Two dates mark different beginnings in Carrier’s history: 1902 is the technological origin, while 1915 is the corporate origin.

In 1902, Willis Carrier was working for Buffalo Forge when a Brooklyn printing operation faced a production problem: changes in heat and humidity affected the dimensions of paper and made accurate multicolor printing difficult. Carrier developed an engineering system designed to control both temperature and humidity for that industrial process.

He continued working on air-treatment technology after that project. In 1906, Carrier received a patent related to his air-treatment apparatus. In 1911, he presented his “Rational Psychrometric Formulae” to the American Society of Mechanical Engineers, extending the technical foundation behind the work.

These early milestones belonged to Willis Carrier’s work at Buffalo Forge; Carrier Engineering Corporation did not yet exist.

Carrier Engineering Corporation Turns the Work Into a Business

Carrier’s independent corporate story began in 1915. Carrier’s historical account places the transition in the business uncertainty surrounding World War I, when Buffalo Forge reduced or discontinued the air-conditioning operation. Willis Carrier, J. Irvine Lyle, and fellow engineers then organized an independent venture.

Carrier Engineering Corporation was incorporated on June 26, 1915. Carrier served as president, while Lyle served as treasurer and general manager. The new company gave the engineering group a separate organization through which to continue developing and applying air-conditioning technology.

The Centrifugal Machine Expands What Air Conditioning Could Do

During the 1920s, Carrier Engineering moved beyond industrial process applications and into larger comfort-cooling opportunities. A central development came in 1922, when Carrier Engineering introduced a centrifugal refrigeration machine.

The Smithsonian National Museum of American History describes that centrifugal design as an important step toward safer, smaller, and more efficient equipment for large-scale air conditioning. That change made large commercial applications more practical and helped broaden the kinds of spaces Carrier could serve.

Comfort cooling became a more visible part of the business during the decade, including installations in theaters and other commercial settings. Carrier’s history was no longer only about stabilizing industrial production conditions; it increasingly included controlling indoor conditions for people.

Merger, Depression, and the Creation of Carrier Corporation

The next major change was organizational rather than purely technical. Carrier Engineering had engineering expertise, but the equipment market was changing and manufacturing capability was becoming more important.

In late 1930, Carrier Engineering Corporation combined with Brunswick-Kroeschell Company and York Heating & Ventilating Corporation. Carrier’s corporate history and the HVAC trade publication ACHR News describe the 1930 merger as forming Carrier Corporation, while the Library of Congress describes a 1931 reorganization into Carrier Corporation. Taken together, the period is best understood as a 1930-1931 merger and reorganization.

The combined organization brought engineering and manufacturing capabilities under one corporate structure just as the Great Depression was putting severe pressure on business activity. Carrier’s historical account also records an effort to preserve research, development, and trained technical staff during the downturn.

J. Irvine Lyle later described how difficult the integration had been: “We have been through two drastic depressions. We have merged and finally digested three organizations into one.” His comment captures a part of the story that a simple merger date can miss. Combining businesses on paper was only the beginning; integrating them took years.

Carrier added a dealer program in 1933 as unitary equipment became more important. In 1937, the company consolidated post-merger manufacturing, engineering, and administrative operations in Syracuse, New York. Carrier’s corporate history says five plants in four cities were brought together at one main location.

War, Postwar Expansion, and the End of the Founder Era

World War II changed the operating environment again. Carrier’s historical archive describes its production and refrigeration capabilities being used for wartime requirements.

After the war, Carrier expanded further into residential and commercial comfort cooling. The company’s own history records larger housing-installation activity and broader residential distribution as air conditioning moved further into everyday commercial and household use.

Willis Carrier died on October 7, 1950, closing the founder era while Carrier Corporation continued into its postwar expansion.

United Technologies Changes Carrier’s Ownership

Carrier remained independent until the late 1970s. United Technologies Corporation began pursuing the company through a tender offer in 1978. The U.S. government challenged the proposed transaction on antitrust grounds, but United Technologies acquired Carrier in 1979.

The acquisition changed Carrier’s ownership without erasing the Carrier business or brand. From that point, Carrier operated within the much larger UTC corporate structure.

During the UTC years, Carrier expanded internationally through acquisitions, joint ventures, distributors, and direct operations. UTC also grouped Carrier with other building-related operations, including Otis and building-automation activities, in a Building Systems structure beginning in the early 1980s.

Environmental and refrigerant changes became another important part of the company’s technical direction in the 1990s. Carrier’s own history emphasizes development of products using non-ozone-depleting refrigerants as regulations and environmental concerns changed HVAC design requirements.

In 1999, Toshiba and Carrier formed Toshiba Carrier Corporation as a joint venture. That relationship would matter again decades later, when Carrier acquired Toshiba’s controlling interest in the venture in 2022.

By the end of the UTC era, Carrier’s geographic reach, partnerships, controls capabilities, and business scope were far broader than those of the independent engineering company formed in 1915.

Carrier Becomes Independent Again in 2020

By the end of the 2010s, Carrier was part of a UTC segment that extended well beyond traditional HVAC. The portfolio included refrigeration, fire, security, and building-automation products and services alongside climate-control businesses.

UTC announced a plan to separate Carrier, and on April 3, 2020, the separation was completed through a distribution of Carrier shares to UTC shareholders. Carrier Global Corporation became an independent publicly traded company under the ticker CARR.

The first years as a stand-alone company brought further changes to Carrier’s portfolio.

In January 2022, Carrier completed the sale of its Chubb fire and security business. In August of that year, Carrier acquired Toshiba’s controlling interest in Toshiba Carrier Corporation while Toshiba retained a minority interest. The transaction expanded Carrier’s position in variable-refrigerant-flow, heat-pump, and light-commercial technologies.

A Portfolio Transformation Around Climate and Energy

Carrier’s most significant recent change began in 2023. Management announced a plan to transform the portfolio around climate and energy solutions. Carrier agreed to acquire Viessmann Climate Solutions while preparing to exit its Fire & Security and Commercial Refrigeration businesses.

The Viessmann Climate Solutions acquisition closed on January 2, 2024. The acquired business added heat pumps, boilers, photovoltaic systems, battery storage, digital offerings, and a larger European residential presence to Carrier’s portfolio.

Carrier also moved in the other direction by selling major businesses. During 2024, it completed divestitures that included Access Solutions, Industrial Fire, Commercial Refrigeration, and Commercial & Residential Fire. Carrier’s filings describe the resulting company as a more concentrated climate and energy business.

The restructuring also illustrates how portfolio strategy can reverse earlier diversification. The independent Carrier that emerged in 2020 contained several business lines outside the company’s climate-control roots. The 2023-2024 program deliberately reduced that breadth while adding new climate and energy capabilities through Viessmann.

One legal issue connected to the former fire-protection portfolio also carried into this period. Kidde-Fenwal, an indirect Carrier subsidiary associated with historic fire-protection products, filed for Chapter 11 bankruptcy in 2023 amid PFAS-related claims. Reuters reported a 2024 settlement framework involving Carrier, Kidde-Fenwal, and claimants; the underlying PFAS claims remained allegations rather than adjudicated findings.

Carrier Today: A Narrower Portfolio With New Building Technology

As of October 5, 2026, Carrier Global Corporation is an independent public company led by Chairman and CEO David L. Gitlin. Carrier reported approximately $21.7 billion in net sales for 2025.

The company reported four operating segments: Climate Solutions Americas; Climate Solutions Europe; Climate Solutions Asia Pacific, Middle East & Africa; and Climate Solutions Transportation. Its current business mix includes climate systems, heat pumps, energy-related technologies, transport refrigeration and monitoring, controls, and intelligent-building systems.

Portfolio changes continued in 2026. Carrier completed the sale of Riello to Ariston Group on July 1 and the sale of NORESCO to OPTERRA Energy Services on August 3. Between those transactions, on July 23, Carrier acquired 75F, a cloud-native, wireless, AI-enabled building-automation company. Carrier presented the acquisition as part of its intelligent-building strategy.

Across those eras, Carrier’s legal identity, ownership, geography, products, and surrounding businesses changed repeatedly. The strongest thread is climate-control capability: it began with an industrial humidity problem, expanded through engineering and manufacturing, and remained central as management reshaped the independent company’s portfolio in the 2020s.

Timeline

This timeline highlights the major verified milestones in Carrier’s technological and corporate development.

Timeline.

1902

While working for Buffalo Forge, Willis Carrier develops a system to control temperature and humidity for a Brooklyn printing application.

1906

Willis Carrier receives a patent connected to his air-treatment technology.

1911

Carrier presents his “Rational Psychrometric Formulae” to the American Society of Mechanical Engineers.

June 26, 1915

Carrier Engineering Corporation is incorporated as an independent company.

1922

Carrier Engineering introduces a centrifugal refrigeration machine, expanding the practicality of large-scale air conditioning.

1930-1931

Carrier Engineering combines with Brunswick-Kroeschell and York Heating & Ventilating in the merger and reorganization that creates Carrier Corporation.

1937

Carrier Corporation consolidates post-merger manufacturing, engineering, and administrative operations in Syracuse, New York.

1950

Willis Carrier dies, ending the founder era while Carrier Corporation continues to expand.

1978-1979

United Technologies pursues Carrier through a tender offer and acquires the company in 1979 after an antitrust challenge surrounding the transaction.

1999

Toshiba and Carrier form Toshiba Carrier Corporation as a joint venture.

April 3, 2020

Carrier Global Corporation becomes an independent public company after its separation from United Technologies is completed.

January 2022

Carrier completes the sale of its Chubb fire and security business.

August 2022

Carrier acquires Toshiba’s controlling interest in Toshiba Carrier Corporation.

April 2023

Carrier announces an agreement to acquire Viessmann Climate Solutions and plans to exit Fire & Security and Commercial Refrigeration.

January 2, 2024

Carrier completes the acquisition of Viessmann Climate Solutions.

2024

Carrier completes major divestitures including Access Solutions, Industrial Fire, Commercial Refrigeration, and Commercial & Residential Fire.

July 1, 2026

Carrier completes the sale of Riello to Ariston Group.

July 23, 2026

Carrier acquires 75F, adding cloud-native, wireless, AI-enabled building-automation technology.

August 3, 2026

Carrier completes the sale of NORESCO to OPTERRA Energy Services.

FAQs

Question: When was Carrier founded?

Answer: Carrier Engineering Corporation was incorporated on June 26, 1915. The technological story begins earlier, in 1902, when Willis Carrier developed a foundational air-conditioning system while working for Buffalo Forge.

Question: Did Willis Carrier invent air conditioning?

Answer: Willis Carrier developed a system in 1902 that became foundational to modern air conditioning while he was working for Buffalo Forge. Carrier Engineering Corporation was formed later, in 1915.

Question: Why do some histories use 1930 and others 1931 for Carrier Corporation?

Answer: Carrier’s corporate history and ACHR News place the merger of Carrier Engineering, Brunswick-Kroeschell, and York Heating & Ventilating in 1930, while the Library of Congress describes the reorganization into Carrier Corporation in 1931. The transition is best understood as a 1930-1931 merger and reorganization.

Question: When did United Technologies acquire Carrier?

Answer: United Technologies pursued Carrier beginning in 1978 and acquired the company in 1979 after an antitrust challenge surrounding the transaction.

Question: Is Carrier still owned by United Technologies?

Answer: No. Carrier became an independent publicly traded company on April 3, 2020, when the separation from United Technologies was completed.

Question: What changed when Carrier acquired Viessmann Climate Solutions?

Answer: The 2024 acquisition expanded Carrier’s European residential climate business and added heat-pump and broader energy-system capabilities. It occurred as Carrier was selling major fire, security, and commercial-refrigeration businesses.

Interviews & Firsthand Resources

Carrier’s Weathermakers Historical Archive

Carrier’s Weathermakers to the World archive brings together first-party historical material on the company’s early products, the 1930 merger period, Depression-era decisions, markets, and company-preserved quotations from figures such as Willis Carrier and J. Irvine Lyle. It is especially useful for readers who want more detail about how the early engineering organization became Carrier Corporation.

View the resource

Sources