I first dealt with NETR a couple years ago when they were one of the City of Somerville's official…read morepartners on a heat pump (ductless mini split) installation campaign. We wanted to install a 1 or 2-zone system, but my condo has a number of unique complications, though, so we weren't able to go forward with the project at that time. Fast-forward a couple years, and we decided to revisit the idea. We also decided to go big or go home this time, with a 5-zone system for the whole house. This time we got estimates from two other companies first, but one provided an extremely high quote and the other basically said that we were asking an impossible job that they could not do. So we reached out to NETR again, and it worked out great. The NETR price was literally more than 10K less (!!!) than what we were quoted by the other company, and they took care of all the secondary project burdens like City of Somerville building permits, upgrading our electrical service, etc. They gave us a clear idea of what to expect in terms of construction disruption, the workers were friendly and unobtrusive, and they finished the work right on schedule. It's too early to speak with certainty about the quality of the system we installed, but we are thrilled to finally have this project complete, and are very satisfied with the pricing, service, and installation work.

In July 2023, NETR installed a $39,000 LG Whole House Heat Pump system in my home (3 indoor units,…read moreattic ductwork, outdoor unit, and a branch box). Since then, I've experienced numerous installation and equipment issues--some posing real safety risks. I found out NETR never pulled any permits for the work. Despite confirming their mistake and promising to fix it, as of July 2025 the project still lacks proper permits and inspections. My town Building Department has followed up several times requesting missing info and payment--NETR refuses to respond to myself or the town, and I am left chasing them. I've had to involve third-party contractors and LG's support team just to get basic issues resolved. NETR has been out to my home at least 10 times since system install, and shown no accountability for any of the downtime, frustration, and safety issues related to this expensive system. If you're considering NETR--do your homework. I regret trusting them with such an expensive and critical system. Expect installation issues, repeated service calls, and premature equipment failures.

My water heater suddenly broke. I called Shawn's plumbing. He came out that day to assess the…read moresituation. He was back the next morning at 10 AM with a new water heater. Installed everything by 1 PM. I had a shower by 130. Less than 24 hours later I was all set. Very competitive pricing. My basement was not easy to get in through the bulkhead and he managed to get everything in Shawn was professional, courteous, reasonable prices. I definitely recommend.

Shawn was great! Prompt, efficient and knew what he was doing! I would definitely recommend him!…read moreThank you!

I need a 2nd mini split installed at my home. Received 3 estimates, all came back roughly in the…read moresame price range. 128 quoted the OEM Mitsubishi unit that I was looking for, (the others did not) along with handling all the permits & electrical needs. Their price also included a 3 year service plan. The install was scheduled 3 days after I accepted the quote, others were scheduling 2-3 weeks out. On the day of the installation, the 128 crew arrived right on time, calling ahead to let me know they were on the way. They showed up with a four man crew, 2 installers for the mini-split and 2 electricians. The work was pristine, the wiring was neat, the unit was placed on a pad and looks great! The crew (Paul, Nedim, Nick & Connor) was extremely professional and curtious. The work was completed by 3pm same day. I am 100% pleased with the work and will be using them going forward for all my HVAC needs.

Quick service and the technician was prompt. Price was on par with other competitors but I feel the…read moreservice was above and beyond.

Extremely professional- very informative-kept me apprised of everything I needed to know-punctual…read moreReally nice guy Ray showed up and was just great explaining everything to me and helping me make my heat pump work better for me. Finally, a great experience with a service technician-it's rare these days!!

We had Morris Plumbing install a split AC unit. They were fantastic. From their response on the…read moreinitial phone call to the rep's visit and recommendations, they were extremely responsive. Chris arrived on time (a big plus for me). He gave us excellent advice, a true expert. They coordinated installation at my convenience. Manny and Dan installed the units -again - arrived on-time. They said 7AM - and they were unpacking their equipment by 6:55. Both of them were so nice and friendly. Their work was clean and even suggested wrapping the units since the hardwood floors were going to be refinished the next day. Excellent idea! saved us a lot of headache if all that dust got in the units. Would DEFINITELY CALL THEM AGAIN!!!!

Great company! It has the brightest and hardest working people. They are great problem solvers and…read morecan troubleshoot any problems you might have.

Steve went above and beyond helping me with my issue. He took the time explaining the issue as well…read moreas what caused it and what to look out for in the future. As a first time homeowner this extra time, answering all questions showed me what truly top notch service AMT HVAC provides! I will be using him again for all my HVAC maintenance needs. Thank you!

Technicians arrived on time scheduled, observed the leaking issue. They explained in detail how…read morethey'd repair would repair it. Within 45 mins they finished an exceedingly professional fix and materials! Highly recommend.

They make themselves available for customers, even after a full day and an unanticipated problem…read more They are great problem solvers and always a pleasure to work with.

Dan and his son Tyler helped me trouble shoot an issue with my mother's furnace this morning. Not…read moreonly were they knowledgeable but Dan drove out of his way to get a part for us. They were courteous, very friendly and very affordable. Dan took the time to discuss over the phone a plan of action and they handled it swiftly and worked very clean. The heat is on and mom isn't cold anymore! I will recommend Callahan Mechanical Services to everyone I know in need of service. I can't thank you guys enough!! -Rich S.

I appreciate the excellent service provided! It truly went beyond my expectations. I felt…read moreappreciated and well cared for throughout the entire experience. Thank you for such exceptional service! Dan is friendly and punctual--fair with the price for his service.

Prompt service. Service gentleman was very professional, explained everything well. Fair price.read more

We had a small piece of pvc piping that needed to be replaced (it was leaking). The technician…read morecalled to let us know when he was on his way, had to run out to get supplies, and got the job done quickly and cleanly. Nice guy, he did a great job and answered all of our questions. My only issue (if that's what you even want to call it) is that I thought it was pricey for such a small repair. That being said, it wasn't something we were going to do ourselves, so for us, it was worth the $$$. I feel very good about recommending this company - he showed up on time and did a great job.

I've hired Anthony a few times now for various HVAC and plumbing needs, and would absolutely…read morerecommend him to anyone! He's reliable, a clear and honest communicator, highly skilled and knowledgable, and does top tier work. He explains his suggestions in a way that is easily understood, and provides options so you can decide what is best for your needs. His prices are fair, especially when taking into account all the extra support he provides - he's even FaceTimed me a couple times to troubleshoot issues when I needed urgent help. He offers the epitome of personalized service, which is rare these days! Will definitely hire again!

Excellent experience with Anthony. Had a ceiling leak in the downstairs bathroom. Anthony had…read morestrong communication skills and came out the next morning. He opened up the ceiling and could see the water coming out under the first floor. He could not see the actual issue because it was above all the duct work etc in the ceiling. It was in a very difficult spot but Anthony reached up and used his expertise to remove the leaking snake bite without being able to see what he was working on. He then put in a new piece and it is now working. Anthony cleaned up the mess before leaving. He was a pleasure to work with and I would recommend him to be called for any plumbing issues.

Communication was aplus, Justin l dealt with, he did agood job,workers we're quiet and efficient.read more

Excellent straightforward service. Noone wants to replace their boiler, but a week after ours died…read morewe're now warm and cozy. Prices seems comparable with other similar services, and customer service is top notch- plenty of text/ email reminders, written quote, arrive on time, clean, courteous and finished on time with no mess. Even brought us space heaters to get through the time without heat.