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 nearly 80 years of experience in home comfort, 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.

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.

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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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    85+ years of service

    To Your Success


    Five Stars

    1,767 reviews



    Five Stars

    1,183 reviews

    T.F. O’Brien review scores as of 4/12/24

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

    When you need HVAC services in your Nassau County home, 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.