If you live in Nassau County, NY and need furnace maintenance, repair or installation, you can count on the professionals at T.F. O’Brien Cooling & Heating to help. We’ve been helping people throughout the Nassau County, NY area with their furnace needs for more than 80 years, and we want to help you too. You can trust us to be your reliable, full-service furnace contractor.
At T.F. O’Brien, we’ve been helping people with their furnace needs for so many years for the simple reason that we believe in always putting our customers first. When you need a professional, reliable furnace contractor, you can count on T.F. O’Brien. Our technicians are superior craftsmen with great attitudes and work ethics, and out main objective is meeting your furnace needs with expertise and courtesy. We strive to keep your Nassau County, NY home warm and toasty, no matter how cold the temperature outside.
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.
"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


T.F. O’Brien review scores as of 10/18/22
Choose T.F. O’Brien as the furnace contractor for your Nassau County, NY home.
- Gas Furnaces in Nassau County, NY
- Gas Furnace Repair in Nassau County, NY: T.F. O’Brien provides gas furnace repair services on most makes and models of gas furnaces, so no matter what type you currently have installed in your home, we can assist you. We’ll provide you with prompt service as well, so you can count on us having your gas furnace repair completed effectively and efficiently. Our technicians are equipped with top quality diagnostic tools and replacement parts, so you’ll know your gas furnace repair will reflect the professionalism and quality you’ve come to expect from us.
- Gas Furnace Installation in Nassau County, NY: Has your old furnace seen better days? Then it might be time to consider a gas furnace installation, especially if you’ve been experiencing lower levels of comfort and higher utility bills. By choosing T.F. O’Brien to provide your gas furnace installation, you’re choosing highly trained experts in the field of home comfort – experts who want to provide you with the best gas furnace products on the market. You can count on your gas furnace installation to provide you with energy-saving comfort for years to come.
- Gas Furnace Maintenance in Nassau County, NY: When the cold weather returns, you want to be sure the gas furnace in your home is operating effectively and efficiently. At T.F. O’Brien, we know that gas furnace maintenance is vital to the life of your equipment. That’s why we offer complete gas furnace maintenance plans to our customers, and why keeping your gas furnace in top condition is a priority to us. By maintaining your gas furnace, you’ll help it achieve peak performance, helping you save on energy bills and repair costs well into the future.
- High Efficiency Gas Furnaces in Nassau County, NY: If you’ve been paying too much for your utilities and you’re still not staying as comfortable as you’d like during the winter months, then it’s time to call T.F. O’Brien for a high efficiency gas furnace. With nearly 80 years in the business of home comfort, we work hard to bring our customers all the latest innovations, including high efficiency gas furnaces that have been built to keep you comfortable – and help you save energy and money by offering up to 98 percent efficiency.
- Gas Furnace Service in Nassau County, NY: The gas furnace in your home is one of the most important pieces of equipment you own. You and your family rely on it to keep you warm throughout the winter and to provide you with energy efficient heating. Did you know one of the best ways you can keep your gas furnace operating in top form is by making sure it receives the proper service? T.F. O’Brien can provide you with the gas furnace service to help ensure your system operates smoothly, efficiently and will keep your family warm all winter long.
At T.F. O’Brien, we complete every job with one goal in mind – to provide our customers throughout Nassau County, NY with the best furnace services available. We will work hard to ensure your complete satisfaction, and we never consider the job done until you’re entirely happy with the work we’ve done for you.
T.F. O’Brien provides the furnace contractor services you need for your Nassau County, NY home.
