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  2. AAON - Wikipedia

    en.wikipedia.org/wiki/AAON

    AAON, Inc. manufactures heating, ventilation, and air conditioning equipment for commercial and industrial indoor environments. AAON is headquartered in Tulsa, Oklahoma and has manufacturing facilities in Longview, TX, Parkville, MO, and Redmond, OR. AAON employs approximately 4,000 people worldwide [1] and has annual sales in excess of $880 ...

  3. List of companies based in Tulsa, Oklahoma - Wikipedia

    en.wikipedia.org/wiki/List_of_companies_based_in...

    This is a list of large or well-known interstate or international companies headquartered in the Tulsa Metropolitan Area. As of November 2012, Tulsa was home to one Fortune 1000 and two Fortune 500 companies: Dollar Thrifty Automotive Group, energy companies: ONEOK (#219), and The Williams Companies, Inc. (#342).

  4. Direct Energy - Wikipedia

    en.wikipedia.org/wiki/Direct_Energy

    It also can perform energy retrofits and other energy management projects at larger facilities. Direct Energy’s Home and Business Services division employs over 1,400 technicians providing residential customers with heating, ventilation and air conditioner (HVAC), plumbing, home improvements, water heater and electrical appliance services. [19]

  5. CityPlex Towers - Wikipedia

    en.wikipedia.org/wiki/CityPlex_Towers

    CityPlex Towers, originally known as City of Faith Medical and Research in Tulsa, Oklahoma. There are three triangular towers with over 2,200,000 square feet (200,000 m 2) of office space. The tallest is the 60-story CityPlex Tower which at 648 feet (198 m) is the third tallest building in Oklahoma (after Devon Tower and BOK Tower).

  6. Dedicated outdoor air system - Wikipedia

    en.wikipedia.org/wiki/Dedicated_outdoor_air_system

    DOAS air handling unit with heat recovery wheel and passive dehumidification. A dedicated outdoor air system (DOAS) is a type of heating, ventilation and air-conditioning system that consists of two parallel systems: a dedicated system for delivering outdoor air ventilation that handles both the latent and sensible loads of conditioning the ventilation air, and a parallel system to handle the ...

  7. £22bn for 'unproven' green tech could raise bills, MPs warn

    www.aol.com/news/22bn-unproven-green-tech-could...

    As the country switches to renewable energy and away from fossil fuels for heating homes and running cars, greenhouse gas emissions like carbon dioxide, also known as CO2, will fall.