Roslyn Nassau neighborhood

HVAC Services in Nassau County, NY

Two HVAC units with a white background.When you need HVAC services in your Nassau County home, trust the experts at T.F. O’Brien Cooling & Heating. With decades of experience in home comfort on Long Island, we are uniquely qualified to meet the needs of customers all over Nassau County. We offer a comprehensive range of services for all your home comfort needs.

Nassau County is one of the most populated and fastest growing areas in the state of New York. With one of the highest quality of life features, it makes sense. From the Sagamore Hill National Historic Site in Oyster Bay to the natural beauty of the Hempstead Plains 40,000 acres. Nassau County is a great place to live and we love helping our neighbors in the county with a full line of HVAC services.

Our highly trained technicians are experts in the field of home comfort, and they work hard to provide each and every customer with quality HVAC services. We’re so sure that our technicians provide the best products and services available in Nassau County that we offer a 100 percent satisfaction guarantee – we want you to be happy with the HVAC services we provide, and you won’t pay until you are.

Get Started with an Estimate

Call T.F. O'Brien Cooling & Heating at (516) 488-1800 or complete our short form below and a representative will reach out to you.







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    "Completely Satisfied"

    "I was completely satisfied with the professionalism, quality, and courteousness of your service. I will continue to call on and recommend you all future AC/Heating needs. Thank You."

    - T.F., Baldwin, NY

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    Google

    4.8

    Five Stars

    1,538 reviews

    Facebook

    4.7

    Five Stars

    63 reviews

    T.F. O’Brien review scores as of 3/13/25

    T.F. O’Brien offers comprehensive HVAC services in the Nassau County area.

    tfo areas servedWe provide complete HVAC services for all of Nassau County which include:

    When you need HVAC services for your Nassau County home, you can count on T.F. O’Brien to meet your needs with courtesy and professionalism. To learn more about our comprehensive HVAC services, please contact us at 516.488.1800 and we will be more than happy to assist you.