Building Comfort Together As Your Family-Owned HVAC Partner

Providing Quality Heating & Air Conditioning on Long Island Since 1934

DUCTLESS AC • HEAT PUMPS • AIR CONDITIONING

Do you have an area in your home that does not have access to your heating system? Maybe you’ve noticed some cold spots in your home. Or, you might want to replace an old baseboard heating system.

No matter what your need, ductless mini split heating and cooling can work for you – and you can count on the experts at T.F. O’Brien to deliver!

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Save Thousands on A New HVAC System

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Save Money and Ensure Top HVAC System Performance With Our Energy Saver Plan

Energy Saver Plan Advantages:

Save money by extending the life and efficiency of your system
Ensure the health, safety, and comfort of your family
Get personal service, 24/7 with discounts on repairs
Protect your system warranty with included annual maintenance

SEE PLAN DETAILS ➔

man pointing at the inner workings of an ac system

Feel the Difference: High Quality HVAC Service With Guaranteed Results

Specializing in heating and air conditioning installation, as well as heating repair & ac repair services for over 90 years, it’s easy to see why we are the trusted HVAC experts in Long Island. Based in New Hyde Park, NY, we are conveniently located to serve Nassau, West Suffolk, and into Brooklyn and Queens. We are proudly a Carrier® Factory Authorized Dealer.

Pay nothing until you are 100% satisfied
We design, install and engineer a comfort system that is perfect for your property
We tell you what to expect up front, with no surprises
We respect you and your property

Pay nothing until you are 100% satisfied
We design, install and engineer a comfort system that is perfect for your property
We tell you what to expect up front, with no surprises
We respect you and your property

PTAC out door unit Install by a technician

Emergency HVAC
Service

Emergency HVAC Service

Don’t suffer with a broken HVAC system. When you need help, and you need it fast, you can rely on T. F. O’Brien to be there as soon as possible. Call us when you have an emergency, 24/7, even Holidays or weekends.

GET EMERGENCY SERVICE

HVAC Maintenance &
Tune-Ups

Annual maintenance and seasonal tune-ups for your heating or air conditioning system are easy ways to keep your system in great shape and help to maintain the warranty. Plus, with a maintenance agreement with us, you’ll receive top-notch service.

SEE TUNE-UP DETAILS

Air Conditioning Systems

Air Conditioning
Systems

When the Long Island summers become too hot, make sure your AC system is working. Whether it’s AC repair or installation of a new system we can help keep your Nassau or Suffolk home cool.

SEE AC DETAILS

Heating
Systems

Heating Systems

When the cold strikes Long Island, you may find it to be time to upgrade your heating system or repair your existing system. Get long-lasting durability and high-efficiency while saving both energy and money on your utility bills.

SEE HEATING DETAILS

North American Technical Excellence Badge

T.F. O'Brien's Angi Super Service Award Badge

We go above and beyond on every project. It’s our promise to you. WHY CHOOSE US?

Packaged Terminal AC Install inside the house

Ductless Systems

Ductless systems can provide both heating and cooling in your home or commercial space, without the need for ductwork. These systems are highly efficient, have a sleek design, and are easy to install.

SEE DUCTLESS DETAILS

Heat Pumps

If you are looking to replace both your heating and cooling systems, heat pumps may be your perfect solution. Our team also provides expert repair and maintenance services.

GET HEAT PUMP SERVICE

Commercial HVAC

In addition to residential services, we provide commercial services to businesses and organizations. These include Heating Installation & Repair, AC Installation & Repair, Boilers Installation & Repair, Maintenance and more!

COMMERCIAL HVAC

Financing Available

If you’re looking to upgrade your system, but you have to work within a budget, then let T. F. O’Brien help make things a little easier with our financing options.

SEE FINANCING DETAILS

12-Year Warranty

When you choose T.F. O’Brien as your heating and air conditioning contractor, you’re also choosing innovative products that come with an incredible warranty.

SEE WARRANTY DETAILS

T.F. O'Brien is a Great Place to Work!

Now Offering Paid Training to Become An HVAC Technician!

At T.F. O’Brien, we work to cultivate a team atmosphere that truly is unique. Where each person is valued and celebrated, not just for the great job they do for us, but for who they are as a person. We offer sign-on bonuses for some positions up to $1,000, competitive wages, benefits packages, advancement opportunities, and more!

View Open Positions

Paid Training Program

Our Recent Work & Reviews In Your Neighborhood

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We Service Our Long Island, NY, Customers for Their Heating and Air Conditioning Needs

Team Member Spotlight

Vinny has played a significant role in the growth and development of the T.FO’Brien we know and love today. Vinny takes pride in the team of individuals that make up our company today. A team of individuals that have made a career out of what they once may have just seen as a job. Individuals who are proud to work as a team and enjoy the camaraderie that has been the foundation of our culture over the years. Talk about a huge accomplishment!

Ronald’s hard work, dedication, and expertise have been key to our success and growth over the past decade. He’s made a huge impact and we’re so grateful to have him on our team. Let’s all give Ronald a big shoutout for his amazing contributions and look forward to many more awesome years together. Thanks for everything, Ronald!

Masud we want to thank you for always Taking Pride In Our Appearance. Your kind efforts to go above and beyond for an interested customer on the sidewalk turned into a remarkable opportunity for the company. You are a proud Ambassador of TFO & We thank you greatly.

Sandy has been with T.F O'Brien for 20 yrs this past September. Thank you for giving your 100% over the past two decades. You have been essential to the growth and success of this organization. We are proud to call you a coworker and honored that you've chosen to work with us!

Shoutout to John for taking the lead role on facilitating and organizing the service and maintenance on our fleet of trucks. john has been vital in executing our truck maintenance. We thank you and appreciate all you did in ensuring our parking lot and trucks were cleared up when the snow storm occurred.

I would like to nominate Richie for constantly being able to brainstorm creative and meaningful paths for how to keep the service department working in our slowest of times. It’s something that I think doesn’t get enough recognition.

I would like to recognize Dalvin for constantly BRINGING IT! He’s sold multiple air scrubbers this month and made great strides in bringing in revenue for the service department. He’s always willing to help, whether it be taking on extra calls or coaching his peers. Dalvin’s always willing and eager to learn and has such a positive outlook on all situations. We’re so grateful that he’s on our team and killing it every day!

Providing Quality Heating & Air Conditioning on Long Island Since 1934

Save Money and Ensure Top HVAC System Performance With Our Energy Saver Plan

Feel the Difference: High Quality HVAC Service With Guaranteed Results