Mike and his team are some of the most talented plumbing and heating experts on the island…read more After moving into our new house 2 years ago (north shore of LI), we recognized we had a very extensive and complicated boiler room (not to mention quite a lot of bathrooms) that was giving us some problems. We had consulted with a few plumbing companies in the area, including some of the bigger ones, and none were really able to grasp the complications of our boiler system. We finally contacted Mike and Matt, and they were able to coherently explain what was going on and what all of the issues were. When we eventually ran into bigger problems with our wall boilers (a result of the prior owners not taking any care of them for a decade), Tumminello was our choice to revamp the entire boiler room with brand new equipment. They are truly experts at their craft (a lot of the technical aspects go over my head). Mike, Matt and their guys did such a great job and we're super happy with out it turned out. They always showed up on time and didn't leave until the job was done. Our boiler room is now much more efficient and organized and, most importantly, in working order (shoutout to Matt in particular for being a rockstar - he could be a rocket scientist for NASA; he also took the care to make sure everything looked perfect and was super organized). We've also used Tumminello for non-boiler-related issues (e.g., sink installation, leaks, clogs, etc.) and they've always responded promptly (and fairly). Truly a one-stop shop for all things plumbing and heating. Do not hesitate to use Tumminello. Very, very highly recommended!

Convinced us to install a really pricey heating system that they said would not need much…read moremaintenance. This was three years ago, and there have been multiple problems each year. Every year when we go to test the heat, it doesn't work. And have had a few other issues in between. Last year they came to fix another problem and charged a ridiculous amount of money, and a few hours later the problem started happening again. I called a friend who's a plumber and he fixed it for $100. Company is a rip off and the owner is awful.

We have used Richie several times over the years. Every time he showed up quickly , he assessed…read more the problem and fixed it for an extremely fair price . He doesn't play games and comes most of the time sooner than he estimates his ETA... he is professional and knows his stuff . I always recommend his plumbing services to anyone who asks .

YES, ZERO stars because I can't give negative stars! The business is six minutes from my home, he…read moreshook my hand and looked me in the eye, when he accepted the job and gave me a price with an appointment for the next day at noon. I'm too old to use this word, but it fits perfectly! I WAS GHOSTED! At a quarter to one I called the number on the business card, he said was always in his pocket. No answer after several tries. Left a few voicemails and tried the other business number on the BELLO BUSINESS CARD. Two days later and no attempt to excuse or explain the blatant disrespect! I've been in this house for twenty years and shrugged off the insignificant question, 1974 on my name plank at the front door. The limp hand shake and constant side viewing. I am too brown to be around MASSAPEQUA PARK. 1974 this was 100% white, but your brown face does not compute with this address. Maybe I'm just annoyed about the disrespect and reading too much into it, but I called the numbers he gave me and we shook hands eye to eye. Even if he has legitimate reason for not taking a job, GHOSTING the client is not a good practice, but who am I to judge? Two days later not a word! "I say BALLO PLUMBING HELL NO!" #I seriously cannot post without adding a star! Little by little we loose our freedom of speech, by the same people that warn us about the other party doing it. I SHOULD NOT BE FORCED TO GIVE A STAR TO A MAN THE SHOWED ME ZERO RESPECT! By adding that star you are forcing me to LIE! NOT A HAPPY CAMPER!!!

Burst pipe in midst of record cold snap. Have been using Berleth for 25 yrs and they are always…read moreresponsive,have great service and trustworthy.

I've been using Berleth for all my plumbing needs at my own home as well as at my mother's house…read more They provide thorough, clean, professional and friendly service. They have fixed every issue on a timely basis, especially important when an emergency leak pops up, as they fit me in this past week. Their entire team can be trusted to quickly and efficiently solve any problem. When we had an issue with an older Kohler toilet, they did not have the part on the truck (which is unusual, they have everything!) the serviceman went off to the warehouse and returned promptly. Skill and dedication. While some have said their prices may be higher than others, I believe you get what you pay for. I highly recommend Berleth.

Great plumbing support. Mike was communicative and explained why they were doing the things they…read morewere. He even made sure placement of a drain was ok based on comments I said earlier.

Terrible! Stay away from this company!! On May 2,2022, I had a scheduled a/c checkup, which was…read morepart of my yearly a/c and heating coverage agreement. They canceled the appointment because it was drizzling outside. Jessica, who contacted me to cancel the appointment told me that someone would get in touch with me within 2-3 days. So, someone should have called to reschedule by May 5. This never happened!! On May 8, I reached out on their company website without any response. On May 9, 2022, I called and got transferred to their answering service. Again, there was no call back! I did the same outreach the next day and Wednesday May 11,2022. I had also written an email to the owner , Mike on May 10,2022. There were a total of 5 outreach attempts without a response, only leaving my cell number for them to call back. Finally, I was fed up with their lack of responsiveness to my calls and e-mails. When I left my third phone message today with their answering service, I told the receptionist that if I didn't get a call back today that I would be writing a negative review and I would be taking them to small claims court to get half of my contract money ( $543 ) returned to me. Only today did I finally get a call back from the owner Mike. He was nasty, when he should have been apologetic to me. He told me that he's dropping me as a customer. He said he was going to come to my home , which I took as an implied threat to me and my family. He also lied to me and told me that he contacted me 5 times. This is a blatant lie as I just spent the last few hours checking my phone records for my mobile phone and landline. He only called back after I threatened to take him to court for breach of contract, which seemed to be what he was doing by avoiding calling me back and providing the services that I paid for in my yearly contract. I strongly urge anyone considering doing business with this company to seek another alternative. He is a nasty owner and can not be trusted. It is virtually impossible to reach anyone by phone and they certainly don't value their customers. I told him that I would give home 3 days from today to return half of my contract money. I don't expect that he will do this. So, I will likely be seeing him court in the near future!! I'd like to give ZERO stars, but apparently I can't do it !!

Needed to hook-up a sink to waste line and kitchen faucet with 2 replaced valves. Very prompt and…read morethey were able accommodate on short notice. My 4 star rating and not a 5 is I felt they were expensive for 45 minutes of work.

Had a bathroom redone and new pipe replace. The guy never returned my call for over a week. Give…read moreme an estimated and I ended up getting a bill double the amount. - I have phone log and time stamp of all the time we attempted to call him and him calling back. After the job done. he kept on calling us , threatening us to pay the bill. We told him that we would pay him monthly and and demande full payment and told us things would "get bad for us" if we didn't pay one time. Thru all this there was no payment contract made by him. He is slicker and calls you when he wants. when he ants. , , rude and overcharges. Total ripeoff My real estate said the same about him. She said he was rude, doesn't return phone calls. You can email at Sammy1964 @ gmail, and I can give you the details of even to validate this post.

All i can say is Michael is the best of the best. had an…read moreemergency leak coming from my baseboard heating system. i called Michael, came over right away and a day later he had many guys in my house fixing the issue. Nobody better than OSI Comfort Specialists and highly highly recommended

I had a great experience today with OSI. I had a water leaking problem from my CAC unit. I called…read moreOSI, and they were extremely responsive, and said they would have a technician mid afternoon. The technician, Steve, arrived exactly when they said he would. I have nothing but accolades for Steve. Besides being an outstanding technician, diagnosing and correcting the problem quickly, he also was very professional, as well as very engaging. Again, I highly recommend this company for your air conditioning and heating needs.

Their technicians do great work though this company had a severe lack of communication and they…read moresent me to collections. I will break it down. 11/2024 the came and replaced a transformer on a buzzing heating unit of which I paid $150 for them to come and evaluate earlier. No bill was issue and I was asked to call the office. The same day they confirmed this fee would be applied to the invoice via phone. An invoice was never received so I figured there was no bill. The transformer is $100 online. I contracted with them to do further work for roughly $2,300. Bill was paid the same day. 3/2025 they issued a bill for $430 for 15 minutes of work. Ok but they did not remove the $150 evaluation fee they charge to just come out though they said they would. I responded immediately to the email asking why it took so long for them to invoice and to remove the $150 as the office promised. No response was received. 4/2025 they sent me to collections for this bill. The company is unprofessional in their communication and I would not recommend them though they did decent work. All they had to do was email back or call regarding the invoice.

Since this is an important decision, I'm going to spend more time on this than a restaurant review…read more I had a Fujitsu mini-split heat pump system installed and 3 heads to replace in-wall air conditioners. Pre-Agreement: 3/5: Ryan came to my house promptly after inquiring and gave me the basics. He took some photos and measurements . I received a quote about a day later. I never saw anything showing that calculations were done to size the unit properly. Perhaps his experience can answer that question quickly but be aware. For a while, there was a good amount of conversation with questions and answers. About a week later, I stopped by their office at Ryan's request and looked at their system. I had some questions that never got answered. For example, I was looking to see if they sold models that were more SEER efficient. I told them multiple times that I wanted to be able to control the system with my phone, but they did not quote me the units that had the WIFI module built in, nor did they order me the Wi-Fi units. I still don't' have them as of this writing. Preparation & Scheduling: 2/5: I called their office about 2 weeks after I first made contact, I committed, and Let Sue know what date I wanted. I was specific because I was trying to schedule enough time between two business trips to get everything done. About a week before the date, their office called me and confirmed the wrong date. This caused me a delay and made it more difficult to get the follow up items done on my side (Painting etc.) They did try to correct this and split the install over 2 days. They were really no help at all at organizing rebates. They should have someone in the office organizing this for their customers. They didn't seem to have a good understanding on the rebates from the electric company and tax credits. They recommended two people: Keith did the construction, spackling and siding repair and was priced right and a good worker. Sean was their recommended electrician who was totally overpriced. He basically had to run a cable about 40 feet in the unfurnished part of my basement and pop a hole outside to mount the box. He charged $950 for an hour of work. Installation: 5/5: Installation took two days. The team arrived on time and worked hard. I didn't even see them take a lunch. They were neat and organized. You could tell they knew what they were doing and had a plan. I received a basic orientation on how to use the system. Post Installation & Follow-Up: 2/5: There was no follow up call to see how the system was working or to give me an update on the WIFI adapters which they told me were back ordered. Operation: 4/5 - After about a month, the system is working very well. It's cooling my space. It is whisper quiet. Often, I cannot even hear it at all. It's annoying not having the ability to set schedules because I don't have the Wi-Fi module. Service: Unknown yet. I have not had an issue. I never received a formal service agreement. They just told me rather informally that it's 5 years labor. They are an elite Fujitsu dealer so it's 12 years warranty on the parts. Value: 3/5: The system that they quoted me was for a SEER rating between 18.2 - 20.0 for cooling and 8.3-9.2 for heating. I would have spent more money for a more efficient system, but I could not get them to engage. Overall: 4/5: The system is running well and a great install. If they ever call me about the Wi-Fi adapter perhaps I'll adjust the rating. The company is promising but could use some improvements: When I visited their office, I saw they had the book Raving Fans by Ken Blanchard. A fine book that is a guide to wowing customers by giving them what they need and more. The company should aspire further to its tenants by ensuring they are wowing customers at the end of a job like the book prescribes. SPECIAL NOTE: The owner of the company called me after reading my review concerned with the original 3 star rating. We had a good conversation and he took some of my feedback constructively. This is a great sign that the company is serious about the feedback from the customers. I have made some adjustments to this review to reflect that conversation and added a star to the review. Thank you Ryan.

I will tell you NEVER call this company. The Owner Ralph is very Arrogant. He has a HORRIBLE way of…read moredoing BUSINESS. I called him in July about a Hot Water Heater Replacement. I picked up the Hot Water Heater. He had a fit. The first thing he said is I won't guarantee the Hot Water Heater. I answered the company gave me a guarentee but you better guarantee the LABOR. He never gave me a PAID RECEIPT for the Labor. Might I also add when I told him I got the Heater myself he increased the LABOR. He never gave me a PAID Receipt, The man is a LIAR. Nobody should hire him.

Didn't show up at the scheduled time and never let me know. Ghosted me when I reached back out.read more