About Us | T.F. O'Brien

Trusted by Long Island, NY Since 1934

There’s certainly something to be said for choosing a Long Island heating & cooling company that’s been in business for as long as we have. Our over 85 years of experience have not only allowed us to perfect the technical art of HVAC — we’re also really good business people. We know how to keep customers.

In fact, T.F. O’Brien’s ultimate goal is to provide the absolute best customer service in Long Island. We accomplish this by employing 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. It’s what makes us tick.

T.F. O’Brien doesn’t just choose the best service people. We provide the training necessary to ensure you get perfect service — and you’ll notice the difference when they arrive at your home or business. Our entire company strives to make sure you enjoy working with us and never have to deal with a hassle. On the rare occasion when we might make a mistake, we’ll do everything we can to fix it and leave you more than satisfied.

Awards, certifications and memberships

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

North American Technical Excellence Badge

Angi Super Service Provider

At T. F. O’Brien we pride ourselves on our customer service and our attention to detail. We go above and beyond on every project, and we think our customers notice a difference. We’re proud to receive awards and accolades, but nothing makes us more proud than the nice things our customers say about us. Our customers were so satisfied, their ratings and references qualified us for an Angie’s List Super Service Award, an honor enjoyed by less than 5% of the service providers rated on the site!

3x Carrier® President’s Award Winner

T.F. O’Brien hires NATE Certified Technicians

Our technicians have successfully completed a series of HVAC, electrical, airflow, installation and service exams, which ensures our customers have highly qualified technicians in their homes. They care for your home and complete the job with speed and precision. All technicians remove shoes on carpets and clean up when they are finished. and take personal responsibility for your satisfaction. They are drug-free and will never swear or smoke in your home.

Better Business Bureau Accredited

Additional Partnerships and Awards

See The Difference

Compare this T.F. O’Brien guarantee with the fine print you might see regarding the service of other HVAC companies. Most can only promise that your system will work afterward, and don’t commit themselves to standards of service and behavior in your home or business or your satisfaction with the process.

We will design, install and engineer the perfect comfort system for your property.
We will tell you what to expect up front. Be it costs, service, repairs, installations, system details and limitations — there will be no surprises.
We will respect you and your property.

We create maximum comfort in all spaces whether residential or commercial.

We service all industries, including:

• Medical Offices
• Houses of Worship
• Retail Spaces
• Restaurants
• Banks
• Schools
• Industrial Buildings
• Funeral Parlors
. . . & More

We’re not comfortable until you are.

If you are not 100% happy with our service you will not pay until you are. This guarantee is why more and more customers are choosing T.F. O’Brien and why our business continues to grow. Give us a call the next time you need service. We look forward to pleasantly surprising you.

One of the most important reasons to choose T.F. O’Brien & Co. is our people. Our technicians are extremely skilled, knowledgeable and highly trained — but we get even more compliments on their attitudes, workmanship and respect for our customers.