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!!

Central air went down; I contacted them for service - FOUR DAYS LATER I get notified "unable to…read moreservice" POOR customer service; at least contact me that day or the next day.

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.

They could respond when someone requests an estimate for work. Why do they put themselves on this…read moreapp if they don't want to respond?

Very responsive and trustworthy. Found this company from the reviews and have to say that they're…read moreall true. He is very responsive and usually picked up any time you call him. If he missed your call, he got back to you same day. Affordable and reasonable service fee. He also was great at identifying and fixing the fault. It was a pleasure doing business with him then and now going forward.

***HIGHLY RECOMMEND! 5+ stars***…read more My furnace stopped working yesterday, so I started making phone calls to different HVAC repair companies. After requesting quotes on Yelp, I got a slew of phone calls from different companies asking if I wanted to make an appointment for an estimate. At 8pm, Nick called and instead of pitching himself to do the repair, he gave us some suggestions as to what the problem could be and how to fix it. Following Nick's suggestion, we made a quick trip to Home Depot, bought the $40 piece, replaced the broken piece. The fix took less than ten minutes and just as Nick had said, the furnace was working again! Never, in my 29 years of home ownership, has a service person ever turned down an opportunity for a job that probably would've cost several hundred dollars (not including the initial diagnostic fee)!! Nick showed himself to be a stand-up guy who wasn't just looking to make a buck off me. And if in the future, I have any other HVAC needs, Nick will be the first person I call. I only wish I could give him more than 5 stars.

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. .

They responded quickly by phone late on Sunday night to a flooding situation in my basement and…read moreguided me to shut off the water to my water heater. Oscar came first thing Monday morning to assess the situation and returned with the new unit and Thomas. They worked for several hours to install unit, explaining how it all worked. In addition, Thomas used my shop vac to vacuum up most of the standing water. Above and beyond!!!

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.

Needed an inspection of boiler for insurance company. Booked…read morean appointment, easy. Guy came when he said he would, sent text earlier to set expectations. Pleasant, explained things in easy to understand manner, addressed a minor issue (no extra cost) and got thing done in a professional manner. Pricing for the inspection was fair and clear. Other companies wanted to layer in other services on top of the inspection (bait switch). I only wanted inspection and it was what I got for a reasonable fair pricing. If I have any boiler issues, these guys will get my business. They are going into my rolodex (look it up youngsters).

Highly recommend! Great service, courteous and reasonable cost! Andrei fixed my unfixable PTAC!read more

Excellent service and communication throughout. Max responded promptly to my Yelp request and…read morescheduled Oleksandr for a next-day visit. Oleksandr was extremely knowledgeable and fixed our heating issue quickly. I highly recommend this company. For context, we had hired another HVAC company two days earlier, and they were unable to diagnose or resolve the problem.

Our AC went out during the spring, which is what prompted us to call Airnizer HVAC--and I'm really…read moreglad we did. They came out quickly, were very responsive over both phone and email, and handled everything in a professional manner from start to finish. Their pricing was reasonable, and they were upfront about costs. They diagnosed and solved the issue swiftly, which was a huge relief given the heat. They also made sure to provide a COI, which we needed for our building, and they accept multiple forms of payment, making the process easy. Overall, a smooth, efficient experience. I'd highly recommend their services.