My heating stopped working right before the 20" snowstorm. David came to my home three times and…read morespent a total of six hours troubleshooting. He finally solved the issue -- a problem so rare that even my HVAC‑specialist friend couldn't diagnose it. I'm truly grateful for the outstanding work David did. He was a real life‑saver. And just a note: if he doesn't pick up your call right away, don't worry. It simply means he's busy, and you can trust that he will always keep his promises, fix the problem, and make sure your home stays warm and comfortable.

David came today to service my central ac unit. Just a great guy so happy that I found him. He's…read morefirst class a gentleman And he is highly skilled.

I had a single split system by Gree installed today, which was purchased at Home Appliance in…read moreOceanside. I am impressed. The two workers arrived on time. They looked over the job, and suggested installation improvement as compared to the system that was being replaced. They were neat, efficient, and professional in every way. If I have their names correct, Thank you to Yng and Shin for expert, professional, courteous installation!!

These guys came in highly recommended by a personal friend. Called them up to have our split…read moresystem removed the have brick work done. They sent over a crew of two. Arrived exactly when they said they would and finished ahead of schedule. Upon completion of aforementioned exterior brick work, the Pro HVAC System crew returned to reinstall our system. Not only did they put it all back together, but also cleaned up the compressors and rerouted the cable internet lines to make it all look professional and tidy! All new copper piping was used to reinstall our split system. Following install, they swiftly collected all discarded materials and left my property cleaner than it was when they came in. Their pricing was more than fair. They conducted themselves in a very professional manner. I can not emphasize enough how much I appreciate people who are punctual and do good work. Would not hesitate to call them again should we experience any issues. Our system has been working flawlessly since the reinstall.

A++++ HIGHLY recommned this Plumbing comapny. Thank you Kris - I called as I woke up this snowy…read moreSaturday with no heat - after a couple of hours - yep no heat working. Called MKC and they asked some quick questions and came over - it was a 30 seco0nd fix + Kris honestly showed me I had inadvertantly turned off an emergency power switch... THANK YOUUUUUU. Professional + Expert services. -LL

Id ignore any recent negative reviews. Im a very critical and anal person. Kris is the same way…read moreand he will not leave the job done unless it's done right. That's something you can tell about him pretty quickly. Kris if you're reading - thanks for the great job on both filters.

Ruh-rohhhh.The motor on our air handler died in August. It was only a 89 degree day, and a super…read morehot week. We come to find out the system is around 35 years old. It's old enough to have a family, a career, a mortgage... Uhh. Time for a replacement. After speaking to 7 companies and getting 3 quotes, I landed on Nick's company. Almost immediately after reaching out, he was asking questions, requesting pictures, and really trying to get an idea of my space. He was kind, thoughtful, and extremely communicative. Unlike one company I dealt with, he was also open to giving me multiple options. There were no pushy sales tactics. He definitely isn't a salesman, he's an installer. Replacing your entire HVAC system is not cheap, and honestly, it is intimidating if you don't know a darn thing about SEER ratings and tonnage. I can research just about anything, so I really appreciated being given the information and having the opportunity to take it back and analyze it for myself and compare. The entire install went great, the team was courteous, respectful and seem to work well with Nick! They were joking around like old friends while working their tails off getting the install done. FYI he is not located on long Island any more, but that doesn't stop him from providing excellent service. He is on the island all the time. We're extremely happy with everything so far and we couldn't have picked a nicer person to do it with. Ps: if you need further proof that he's an all around great guy, he loves animals, too!!

Absolutely amazing overall! My AC stopped working, and instead of immediately trying to charge me…read morefor a service call, Nick took the time to troubleshoot the issue with me over the phone. He figured out exactly what was wrong, told me which motor to purchase, replace the capacitor and patiently explained how to replace both and get everything working again all without ever having to come to my house. He was extremely knowledgeable, honest, patient, and genuinely cared about helping me. It's rare to find someone who provides this level of customer service and doesn't try to take advantage of you. I highly recommend him to anyone who needs AC repair. Nick definitely knows his stuff and will be the first person I call for any future HVAC issues or new purchases!

I had a bad experience with another company that my building recommended. A neighbor recommended…read moreKevin and they did not disappoint! Kevin dispatched Paul and his team to remove, clean (off-site because our building required it), and re-install our PTAC units, and I could not be happier. They were so careful with our home, furniture that needed some moving, and the PTAC units, and when they were done, they left our home the way it was and cleaned up after themselves. The units are now squeaky clean; I don't hear a sound! The price was reasonable and honest. I'm happy I found a trustworthy, thorough and meticulous company to care for our PTAC needs. I'll be a returning customer!

He was quick to respond and he diagnosed the issue quickly. Charged $300 less than the first…read morecompany I contacted. The furnace was fixed in about an hour and Mom had heat again!

April 22,2025 I used this company to install heat pumps in my home. Liaca helped me with the…read morerebates and other financing options. They really did a good job. They were on time, respected my wishes on removing their shoes, and they clean up after the installation. I was pleased with the outcome come. They tested the units and gave me a quick tutorial on how to use the units. I also included photos of the finished job. We'll recommend. Thanks to the team.

My central air unit died. We needed to replace our central air unit and decided to upgrade to one…read morewith an air pump. John was great to work with. He came to take a look at the space and provided his recommendation and promptly sent us the quote after. We had gotten quotes from multiple places and their pricing was fair. He was very responsive and answered all of the questions we had. For any questions he wasn't able to answer immediately he got back to us promptly with the answer. Seth and another guy was responsible for installing the unit on the day of. John came by to make sure the installation was going okay. The guys were quick and efficient with the installation. The job itself was very clean install of the unit and they covered the pipe going down the side of my house so it looks a lot better! They completed the installation all in one day, which was great! They took away the old unit and cleaned up afterwards. We also ended up upgrading our thermostat. John was accommodating and sent Seth back at a later time (after we received the new thermostat) to install the new thermostat. It took a bit to get the heat pump working but ultimately it was all done and John and Seth stayed to make sure both the AC and heat pump was working. So we were very happy with how the project was handled and completed.

I tried calling five times and never heard back from anyone. I had to let it ring in order to leave…read morea message on the voicemail. I have been a customer for 5 years and I am insulted how they treat loyal customers. I have spent over 20k over the last 5 years or better. I had them service my heating and air conditioning systems before the season and after each season. Too bad I try to hire locally and give business to businesses in my community. Good Luck.

Not a professional organization buyer beware. They installed a unit that did not work and blamed…read moreeverything on the manufacturer. Not only that but wasted my time on repairs that did not work. .

We have worked with T.F. O'Brien since we had our ductless AC system installed in 2021. They did…read morea great job installing the system and in seemlessly coordinating the removal of in-wall air conditioners. In the years since we have had our annual maintenance visit and any work necessary has been done professionally. All of their technicians are knowledgeable and pleasant - never had a problem. They take great care when in a customer's home to be tidy and if anything needs to be moved to access the unit they are working on, it is moved with care and put back when they finish their work. They are a family run company who truly cares about their customers.

I've used this company for years. Their strength was their personal service, family owned. I…read moretrusted them completely. When I called, the receptionist and I were on a first name basis. Something has changed drastically and for the worse in the last year. Since 2020, they have installed a generator and two separate cooling and heating systems in my home. I've spent literally 10s of thousands with them. Issue 1: They have purchased the world's most obnoxious AI system to answer their phone. Yesterday I called during regular business hours. The AI- 'Rachel' would not put me through to a human, laughed at me (YES!) and insisted it could handle my issue. It literally gets condescending and snarky. Issue 2: The quality of their work has fallen off. New heating installed in September. Turned on in December. No heat to an entire floor. The fans weren't installed correctly. New AC installed last June. Not working. Really? Waiting on service call later this week. Issue 3: Add on charges for everything. For instance, with the AC service call this week, which I am only using them for because they installed it and should be responsible, I was told (even though I purchased a service plan and the system is still under warranty), that it would still be $94 plus for the call if it is something not covered by installation or warranty. The $400 service plan plus $94 would more than cover a call from another company and..... what could it be besides faulty equipment or an installation error like the heating? I had similar issues with generator problem in February. Paid for the service call, he didn't have the part and they wanted to charge a second service fee when he came back. I have recommended them countless times to others. I will be finding a new vendor once the AC issue is resolved. So done.

Perfect experience. Straight to business, installed 2 splits in less than 2 hours and left no mess…read morebehind. Polite, courteous. Just the perfect transaction that you'd want with a project like this. Also, very knowledgeable. They noticed an issue with the original plan, pointed out some problems with the wall and suggested a much safer alternative. So far everything is working great and my 2-story house is perfectly cool in this hot weather.

Siarhei, arrived and asked questions on my old unit, inspected connections and looked at my…read moreelectric panel. He answered all my questions on the process of replacing the unit. His crew came on time and got right to work. They installed a Mitsubishi Mini Split , informed me on any other needed adjustments They are very respectful and will answer questions. They are excellent!!

I recently had my mini-split AC units deep cleaned, and I cannot recommend this company enough…read more From start to finish, the experience was seamless and highly professional. Max was fantastic to work with from the very beginning. His communication was constant, incredibly clear, and prompt. He went above and beyond to make sure all the scheduling details were perfectly aligned and that the estimate was accurate. It's so rare to find this level of responsiveness and transparency. On the day of the service, our technician, Oleksandr, was outstanding. He was incredibly thorough with the deep cleaning and treated our home with the utmost respect. What I appreciated most was how he took the time to explain exactly what he was doing at every step of the process. His work was meticulous, and he left the space spotless. If you are looking for an HVAC company that is honest, thorough, and genuinely cares about customer service, look no further. I will absolutely be using them again!

The team at Airnizer are excellent. I recently had a mini-split unit installed in one of my rooms,…read moreand a separate cleaning effort for multiple mini-split units. They are extremely responsive through text and phone calls, providing all details and cost breakdowns so there aren't any surprises. The pricing is on par with competitors in the area. As for the work itself, the team was prompt, showing up at the earlier end of the promised time window. They were efficient with both installation and cleaning efforts. The installation went seamlessly and flawlessly. Overall, I would absolutely hire Airnizer again as they provide an excellent level of communication, responsiveness, and overall service quality.