Home About Willis Carrier Contact Us Carrier.com

The Invention That Changed The World

On July 17, 1902, Willis Haviland Carrier designed the first modern air-conditioning system, launching an industry that would fundamentally improve the way we live, work and play.



The Launch of Carrier Air Conditioning Company

In the opening decades of the 20th century, Willis Carrier established Carrier Air Conditioning of America as the worldwide leader, advancing the science and application of air conditioning across multiple industries around the globe.



Manufactured Weather

Launched as an independent company in 1915 by Willis Carrier and six other courageous entrepreneurs, Carrier Engineering Corporation provided manufactured weather to over 200 industries with an unmatched promise of "the whole job, the whole responsibility, and a contract for results."



Beyond the Factory

The introduction of centrifugal refrigeration by Willis Carrier in 1922 was a landmark event, launching modern air conditioning from the factory floor into movie theaters, office buildings and department stores, and treating the general public to its first taste of cool, clean and comfortable "Manufactured Weather."



Weathermaker to the World

Despite the Great Depression, Carrier Corporation never stopped investing in the art and science of air conditioning leading the industry in railroad and marine applications, and pioneering the creation of efficient systems for business and home. The company extended its reach to markets in every corner of the globe, enhancing its unparalleled position as "Weathermakers to the World."



Distinguished Service

Carrier Corporation provided exceptional leadership throughout World War II even as it prepared diligently to meet the needs of a postwar world. In his final decade, Willis Carrier successfully completed one of the most satisfying projects of his storied career before becoming Chairman Emeritus and turning his company over to a new generation of leadership.



Growing With the Babyboomers

A half-century after his invention of modern air conditioning, Willis Carrier's rich legacy included the creation of a billion-dollar industry and founding of the preeminent global provider of commercial air conditioning. In the next 25 years, Carrier Corporation grew with the postwar baby boom to become the largest player in the flourishing market for residential comfort air that would change the face of the world.



Expanded Global Reach

The marriage of United Technologies Corporation with Carrier proved to be a formidable combination, resulting in creation of a Global Manufacturing Platform and market leadership in every region of the world, backed by an unparalleled commitment to environmental sustainability.



Natural Leadership

Built on Willis Carrier's extraordinary invention of modern air conditioning and his unyielding commitment to innovation, Carrier today is a lean, focused company meeting the needs of local markets with global resources, and leading the industry with products that delight customers while protecting our fragile envirionment—natural leadership for the 21st century.



The introduction of centrifugal refrigeration by Willis Carrier in 1922
was a landmark event,
launching modern air conditioning from the factory floor into movie theaters, office buildings and department stores, and treating the general public to its first taste of cool, clean and comfortable "Manufactured Weather."

Three 75-ton units at the Stephen F. Whitman & Son's Philadelphia candy plant in 1923 were the first installation of Carrier's historic centrifugal chiller.


Beyond the Factory

In May 1922, Willis Carrier unveiled his single most influential innovation, the centrifugal refrigeration machine (or "chiller"). Over the next decade, the centrifugal chiller would extend the reach of modern air conditioning from textile mills, candy factories and pharmaceutical labs to the revolutionary work of ensuring human comfort in theaters, stores, offices and homes.

Supported by nearly 20 new patents, centrifugal chillers provided affordable, safe and efficient cooling. The first sale was made to longtime customer W.F. Schrafft and Sons Candy in Boston, though the honor of the first installation went to Philadelphia candy manufacturer Stephen F. Whitman & Son.

Other elements of modern air conditioning evolved to keep pace. Carrier partnered with three large fan manufacturers in May 1923 to found the Aerofin Corporation. Aerofin offered a lightweight, brass and copper alternative to bulky cast-iron heat exchangers.

Powered by these innovations, Carrier launched its own version of "the Roaring Twenties" in 1924 with the first in a series of historic installations. The J.L. Hudson Company, Detroit's largest department store, installed three, 195-ton centrifugal chillers. Officially classified as comfort air conditioning, Willis Carrier noted, the installation was also designed "to meet an emergency as temperatures soared on basement bargain days—people fainted." Other sophisticated retailers in Seattle, Boston, Cincinnati, Dallas and New York City soon followed.


Shown in the Carrier plant in 1922, the first centrifugal chiller opened the door to large-scale comfort air conditioning.


Department stores proved to be the warm-up act, however, to a kind of public installation that would truly put centrifugal chillers and comfort air conditioning on the map: movie theaters. Carrier set about conquering the theater industry in three giant steps. First came the successful installation of comfort air at Sid Grauman's Metropolitan Theatre in Los Angeles. While employing traditional ammonia refrigeration, the installation introduced two striking advances in modern air conditioning, bypass circulation and down-draft distribution systems. Together these improvements changed the economics of theater installations and improved the experience of moviegoers by replacing the cold chill of "mushroom" vents at their feet with a gentle flow of air from ceiling registers. The Palace Theatre in Dallas and The Texan in Houston represented the second important step, becoming the first theaters to successfully install complete Carrier systems including centrifugal chillers, down-draft and bypass.

As it turned out, movie theaters often became the place that people experienced comfort cooling for the very first time.

Sid Grauman's Metropolitan Theatre in Los Angeles offered moviegoers luxury and comfort, courtesy of centrifugal chillers by Carrier.


With Carrier centrifugal chiller equipment in the basement, and air conditioning on the roof, the T.W. Patterson Building in Fresno, California, cooled floors 2-7 for its tenants, becoming Carrier's first multi-story installation.


With its "off-Broadway" work a success, Carrier took the third and most important step in movie theater comfort by installing a complete centrifugal chiller system in the Rivoli Theatre in New York City, meeting with instant acclaim.

Skyscrapers were next to benefit from centrifugal refrigeration. In 1926, the T.W. Patterson Building in Fresno, California, became the first multi-story building to be air conditioned by Carrier.

This was followed by the 21-story Milam Building in San Antonio, Texas, "the first skyscraper air conditioned from basement to roof during its construction," engineer Logan Lewis wrote. In 1928, the Frost National Bank in San Antonio became the first bank to be cooled by Carrier centrifugal refrigeration. Success led to organizational growth. In September 1929, Carrier announced the opening of a permanent Engineering and Sales office in Dallas, pointing to its installations at the Palace Theatre, the Milam Building, Halliburton-Abbott's in Tulsa, Titche-Goettinger's in Dallas and Sanger's in Fort Worth. Air conditioning had come to the American Southwest, and things would never be the same.


As Carrier reached to new heights in America, it reached to new depths internationally.

In 1928 the company installed two 76-ton centrifugal chillers in the Morro Velho Gold Mine in Brazil, an installation destined to vastly improve the working conditions of miners all over the world. Led by its London subsidiary, Carrier also planted offices in Sydney, Paris, Bombay, Johannesburg and Stuttgart throughout the decade.

Successful large installations created demand in smaller venues. In 1926, the Capital Theatre in Shamokin, Pennsylvania, became the first installation of Carrier refrigeration using the "ejector system," a boon to small theaters unable to install overhead ductwork. By 1928, Carrier was offering commercial "unit air conditioners" that allowed, for example, small-store owners to compete with comfort-cooled department stores. The success of these units led to the creation of the Standard Products Division, which sold its first unit air conditioner in February 1928 to cool the egg storage room of the Merchants Refrigerating Company in Newark, New Jersey. Sales of unit air conditioners also led to the formation of a new subsidiary, the Carrier-Lyle Corporation, which marketed an important new product, the Weathermaker, to homeowners.

With business booming and the product line expanding, Carrier purchased a second building in Newark. The older "Carrier Plant" was now home to the centrifugal shop and the company's research labs, while the newer "Lyle Plant" housed the unit products, Aerofin and the corporate offices. A year later the company built its third plant in Allentown, Pennsylvania, to handle sheet metal fabrication. This grew the company's manufacturing capacity, the Chief noted, "from none in 1921 to over five acres in 1929."

J. Irvine Lyle also challenged his partner to install in the Lyle Plant "the best air-conditioning system ever designed for an office building." The installation of a central station air-conditioning apparatus leading to under-the-window connections would turn out to be the first important step in the creation of the Weathermaster, soon to revolutionize the air conditioning of multi-room buildings.


6,400 feet below the surface, miners worked in greater safety and comfort thanks to Willis Carrier's groundbreaking 1928 installation at the Morro Velho Mine in Brazil.

The Carrier Unit Air Conditioner premiered in 1928 as a way for small-store owners to compete with large retailers.


The Rivoli Theatre on Broadway in New York City found itself to be a haven from the heat of summer, generating more year-round patrons and profits thanks to Carrier air conditioning.


Macy's actively promoted its Carrier air conditioning,
advising shoppers to "shop and still be cool."

Carrier's installation of comfort air in the U.S. House of Representatives in 1928 was a historic first in a decade of historic firsts.


As the company grew, Carrier and Lyle emphasized the care and education of employees. In October 1925, Carrier University was founded with six professors, 20 students and Willis Carrier as president. The following year, the company launched a Safety Organization which included seven safety inspectors. "No safety device has yet been invented," the inspectors reminded employees, "to take the place of the one just above the ears."

In 1925, Carrier tackled the United States Navy's desire to air condition the engine room of a destroyer, and in the spring placed a redesigned centrifugal refrigeration machine on board the USS Wyoming. Such specialized installations encouraged the Chief to continually improve on the success of dilene—the breakthrough refrigerant for his first centrifugal unit— leading to the introduction of products like Carrene I that would double the output of a centrifugal machine without changing its size, weight or footprint.

As the decade progressed, Carrier found the emerging broadcast industry to be a ready partner. In 1927, the company provided air conditioning to the National Broadcasting Company's new, 16-story building on Fifth Avenue in New York City, representing "the first comprehensive, scientific effort to create an ideal broadcasting center." Nearby, a compact 75-ton centrifugal machine brought comfort and efficiency to the Paramount News Laboratory, allowing an exposed film negative to be developed, dried and projected just 20 minutes from receipt.

In but a few short years Willis Carrier's centrifugal refrigeration had brought Carrier Engineering Corporation to the movies and shopping, into offices and mines and aboard naval ships, to hockey games and broadcast studios, and from Broadway to Europe, South America and Australia. Even as modern air conditioning continued to improve the productivity of global industries, comfort air had fully captured the imagination of the public.

By the close of the 1920s, Carrier Engineering Corporation had established a new industry, becoming equally adept at industrial air conditioning for efficiency and air conditioning for human comfort.


In a February 1929 speech, Willis Carrier reminded his audience that "twenty-five years ago 'Air Conditioning' was an unknown quantity either in theory or practice. In years to come," the Chief forecast, "air conditioning and cooling for summer may become a necessity rather than a luxury, and we will look upon present times as marking the end of that 'dark age' in which there was but relatively little cooling for human comfort."

Of course, the founder of modern air conditioning and inventor of centrifugal refrigeration would be correct. But this was only February; in October 1929, Black Thursday witnessed a collapse of the stock market and the start of the longest, deepest depression in world history.

Carrier Engineering Corporation would need to remain focused, nimble and innovative if it was to build on the many firsts and enormous success of its "Roaring Twenties."