Providing Quality Heating & Air Conditioning on Long Island Since 1934

DUCTLESS HEATING   •   HEAT PUMPS   •   HEATING

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 heating can work for you – and you can count on the experts at T.F. O’Brien to deliver!

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Save Money and Ensure Top 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

Ductless AC

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 85 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.

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  • 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

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.

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.

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.

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.

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We go above and beyond on every project. It’s our promise to you. WHY CHOOSE US?
Air Conditioning Contractors of America Logo
North American Technical Excellence Badge
T.F. O'Brien's Angi Super Service Award Badge
better business bureaua logo
EPA icon
Logo
We go above and beyond on every project. It’s our promise to you. WHY CHOOSE US?

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.

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.

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

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!

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