No Ducts? No Worries! Choose an Energy-saving Ductless System

Do you have an old radiant or baseboard system in your home that you’d like to replace with something more energy efficient? Ductwork can be very costly to install, requires extensive renovation, and in some cases, there simply may not be room for it. The solution is simpler than you think – ductless heating and cooling.

A ductless system is simple to install, and requires minimal construction.

That’s because a ductless heating and cooling system uses heat pump technology that does not require additional ductwork in your home. But an even more exciting benefit to choosing a ductless system is the energy savings you’ll enjoy. Modern heat pumps can reduce electricity use by nearly 50 percent, according to Department of Energy estimates, and that benefit means you’ll save energy – and money on your utility bills.

And, when you install a ductless Daikin® mini-split system, you’ll enjoy other benefits as well.

  • Your energy-efficient Daikin system will provide both heating and cooling, so you can stay warm in the winter and cool in the summer.
  • Because separate units are installed in each room in your home, you’ll enjoy targeted comfort – you’ll be able to control the temperature in each space, creating your ideal indoor climate.
  • Ductless systems also provide quiet operation and a longer operating life.

At T.F. O'Brien, our quality ductless systems help you save energy – and save the planet.

Our systems use a refrigerant that doesn’t deplete the ozone layer and is more energy efficient than older types of refrigerant. And, they’ve achieved an ENERGY STAR rating, so you know they’ll save you energy.

Trust the experts at T.F. O’Brien for courteous, professional services.
(516) 488-1800
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See how Daikin ductless systems can improve your comfort and save you money

Unlike single speed systems, Daikin ductless inverters offer variable speeds for more efficient home comfort.

Hear the difference in a Daikin ductless system from T.F. O'Brien

Our ductless solutions are engineered to operate under 50 decibels. Comfortably enjoy your home with a Daikin ductless system.

Have you heard about our Shamrock Sale?

"Exceeded Expectations Throughout"

"The installation of a new central a/c unit exceeded expectations throughout the entire process...a true professional team throughout.

Thorough explanation of available options, responsive scheduling, seamless installation in one day by a diligent crew that took great care to be neat and clean, including the complete removal of the old system.

Would highly recommend the T. F. O’Brien team for installation of a new A/C system"

- Jim Graf, T.F. O'Brien Customer

Insured, Highly Qualified Professionals


Superior Craftsmen with Great Attitudes and Work Ethic

Our people are passionate about sharing their technical expertise to make every day more comfortable in our customers’ homes and businesses.

  • NATE Certified Technicians
  • EPA Certified
  • BPI Heating Certified
  • Professional Engineers (PE)
  • Family Owned since 1934
  • National Association of the Remodeling Industry (NARI) Member
  • Air Conditioning Contractors of America (ACCA) Member
  • A Huntington Township Chamber of Commerce Member
  • A New Hyde Park Chamber of Commerce Member
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Pay Nothing Until You Are Completely Satisfied


You can expect the following from our techs when they do work for you:

  • They will care for your home and complete the job with speed and precision.
  • They will not wear shoes on your carpets.
  • They will clean up when they are finished and take personal responsibility for your satisfaction.
  • They will not swear in your home.
  • They will not smoke in your home.
  • They are drug-free.

If you’re not completely happy when our technicians are done with the job, you won’t pay until you are totally satisfied with their work. The next time you need heating and cooling work done, call T.F. O’Brien and experience the difference.

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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, subject to credit approval.

Proudly Serving Long Island Since 1934


Specializing in heating and air conditioning installation, as well as heating repair & ac repair services for 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.

Kerry O'Brien

T.F. O'Brien is a full-service ductless contractor. In addition to ductless heating & AC installation on Long Island, NY we also provide:

tfo areas servedT.F. O'Brien is a full service heating and cooling contractor. In addition to ductless AC and heating installations, we are pleased to offer:

Click For Areas We Provide Ductless Services: