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!

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.

Callahan has serviced our heating and A/C for over ten years, keeping older systems running well…read more at reasonable cost. Office is responsive, technicians are prompt, cost seems reasonable. It feels good to know I can trust to have problems solved expeditiously.

I had my annual boiler checkup done today, and the young man that serviced it was very thorough and…read moreknowledgeable. He was also very polite, and answered all my questions. Callahan installed my A/C back in 2000, and it's still going strong 24 years later. I'll definitely call them early next year to service it, hopefully for another year.

After dealing with several private-equity backed HVAC companies that felt more like high-pressure…read morecar dealerships, we were relieved when Gill from Warrior Heating and Cooling came by. From the start, he was honest, thorough, and transparent. He took the time to explain everything clearly and never once tried to upsell us on things we didn't need. We decided to replace both our AC system and gas furnace (after the furnace died on the morning of the first blizzard!) with new American Standard units, and Gill gave us a very fair and reasonable price. While Warrior may not have had "7 trucks ready to finish the job in one day" like some of the larger companies promised, Gill and his team focused on doing the work the right way -- with care, professionalism, and attention to detail. What really stood out was the customer service. Gill even helped us install and set up a new smart thermostat I had purchased myself. It's rare these days to find contractors who are both skilled and genuinely trustworthy. We'll absolutely be calling Gill again for any future HVAC needs, and we highly recommend Warrior Heating and Cooling!

Very professional and honest. Helped with cleaning and descaling , explained everything clearly…read morewithout pushing unnecessary replacement. Would definitely use 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!

This company came out after two other companies had looked at my system. The other companies told…read moreme to get a whole new AC system installed, to the tune of $20k. ABC was easy to contact and was very responsive. He visited my house and did a thorough job of troubleshooting the system. He was able to find that the system needed a small electrical repair and that everything else was in fine working order. Highly recommend!

very responsive and knowledgeable on a wide variety of appliances. Will use again for any repairs!read more

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.

Highest quality work at the lowest price. That's what I found with Jay. Very honest and Great at…read morefinding difficult problems like a gas leak I had in a heat pump network. He's my first call for anything close.

Jay came right down, fixed our ac motor and charged a reasonable price! Excellent service!read more

I am a new customer and found them to be an amazing company. Excellent customer service with great…read morecommunication skills. I was dealing with "Thermoil in Belmont, MA" and got zero answers from them with back and forth nonsense about an electric water heater that I needed replaced. So after a few months of nothing from "Thermoil", I texted 128 Plumbing in Wakefield on a Sunday, got a response and had an appointment for the beginning of the week. They had a person come over to look at the work I needed done and the next day they had "Tony and Santos" come over for the installation of a new electric water heater. They have great service plans for their customers, giving you the top products offered in the field for your piece of mind on longevity and durability. You know who you are dealing with when someone comes over to work in your house with company vehicles. Not someone in a beat up personal vehicle that looks like they are having issues. If there were more star ratings I could give for 128 Plumbing it would be a 100% star rating. Charlie Boyd Chelsea, MA

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