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  2. Vertiv - Wikipedia

    en.wikipedia.org/wiki/Vertiv

    Vertiv began as Capitol Refrigeration Industries, established in 1946 by Ralph Liebert (1918–1984) in Columbus, Ohio. Liebert developed the first prototype precision air conditioner in his garage. In early 1965, the prototype was introduced to IBM in Chicago. Recognising the machine's potential, IBM arranged for Liebert to debut his invention ...

  3. Heating, ventilation, and air conditioning - Wikipedia

    en.wikipedia.org/wiki/Heating,_ventilation,_and...

    Heating, ventilation, and air conditioning ( HVAC) [1] is the use of various technologies to control the temperature, humidity, and purity of the air in an enclosed space. Its goal is to provide thermal comfort and acceptable indoor air quality.

  4. Liebert Corporation - Wikipedia

    en.wikipedia.org/wiki/Liebert_Corporation

    Liebert Corporation was a global manufacturer of power, precision cooling and infrastructure management systems for mainframe computer, server racks, and critical process systems headquartered in Westerville, Ohio. Founded in 1965, the company employed more than 1,800 people across 12 manufacturing plants worldwide.

  5. Lennox International - Wikipedia

    en.wikipedia.org/wiki/Lennox_International

    Lennox International. Lennox International Inc. is a provider of climate control products for the heating, ventilation, air conditioning, (in the complex colloquially called: HVAC) and refrigeration markets. The company is based outside Dallas, Texas in the United States and has operations globally.

  6. List of largest companies in the United States by revenue

    en.wikipedia.org/wiki/List_of_largest_companies...

    This list comprises the largest companies currently in the United States by revenue as of 2023, according to the Fortune 500 tally of companies and Forbes.. The Fortune 500 list of companies includes only publicly traded companies, also including tax inversion companies.

  7. List of airlines of the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_airlines_of_the...

    This is a list of airlines which have an air operator's certificate issued by the Federal Aviation Administration of the United States.. Note: Destinations in bold indicate primary hubs, those in italic indicate secondary hubs, and those with regular font indicate focus cities.

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