Heating & Air Conditioning / HVAC near Londonderry

“Southern NH Plumbing and Heating was fantastic to work with. They were professional, responsive, and showed up exactly when they said they would. The work was done efficiently and with great attention to detail, and they took the time to explain everything clearly before and after the job. It’s hard to find reliable contractors these days, but this is a company you can trust. Fair pricing, honest service, and quality work. I would absolutely recommend Southern NH Plumbing and Heating to anyone in the area and will definitely be using them again. 5 stars!! ⭐️⭐️⭐️⭐️⭐️“

“Fantastic service!! Very professional. Very reasonable price. I plan on using them for annual maintenance and repairs based on their excellent first interaction.“

“Michael was very friendly and professional. I would recommend using Heritage to anyone.“

“The HVAC system replacement with Joyce couldn’t have been better. Our technicians, Benjamin P., Josh Z., Andres C., and Stephen J. were an excellent team, and they worked through the unique issues they encountered with care, installing a new system that operates as well as we’d hoped. They arrived both days at the earliest time expected, and ensured that the house had heat before they left on day one. There were several times during the process that additional support technicians from Joyce came to assist the core team with various tasks , ensuring the most expert results. Benjamin regularly updated us with progress and next steps, and spent time while we set up the Lenox app showing us how to program and manage the thermostat. We would highly recommend Joyce for HVAC work, and are fortunate to have been given a recommendation from our realtor. We will use their annual maintenance program going forward to ensure that our HVAC system continues to function at its best.“

“They are top notch. Been using them for cleanings and a couple of emergency repairs. Bailed me out. Just had a new oil tank and furnace installed. Couldn’t be happier. Great crew and very satisfied“

“I can't say enough great things about this company and serviceperson Jim. Courteous prompt service. Quick responses. I am a new resident in this state and had no prior connection to any heating service here. Not only was each employee I spoke with wonderful but they helped me quickly and efficiently. I am now a customer forever.“

“We had a component fail on an older boiler near the holidays. I got a few quotes from some competitors and then a friend of mine referred me here. Lila and her team helped rearrange schedules and I get the job done in time for us to host and beat out all of the other quotes we received by 30%! Couldn’t recommend them more. Bonus the are locally owned and operated for four generations!“

“I am very grateful for the service and plumbing work I received from Jason . Very professional and an excellent job I will use Daigle Plumbing for all my future needs. Thank you to Jason and all your staff“

“I gave 5 stars so you would read this. THIS COMPANY SUCKS!! THEY DID A BIG OLE BAIT AND SWITCH. COST ME 4200 MORE THAN QUOTED ON THE PHONE!!“

“On time, I have been using Patriot for years! Great service and they offer more than most oil burner companies ?“

“Highly recommend Derry Plumbing and Heating a great company and family that’s hands down amazing! Had to call and get our gas stove installed and propane furnace fixed, fast, efficient, very knowledgeable and friendly! Will absolutely have them come out again with any future plumbing and heating needs for our family.“

“Jacob did a great job explaining my situation to me and relaying my story to the service manager at the office. I received my quote quickly and clearly stating the options available to me with clear pricing and available discounts. I was impressed with the quality of work and the efficiency of service. Thank you.“

“Fantastic company! We had our Generac generator serviced in the past, and had negative experiences with two other companies, but today (10/24/25) Alex from JN came out, and we were very impressed with his knowledge of our Generac! He was informative answering all of our questions, professional and down to earth friendly. He serviced our unit, replaced an old battery, and had our system functioning perfectly! From the moment I called and spoke with one of the owners, I felt this would be a great experience, and it was! They are appreciative of military folks too so that is a plus for this company as well. We got the run around by other companies, but JN knew exactly what to do, and what was needed of our Generac! Thank you JN for putting us at ease knowing our generator is ready for the winter, and what our Generac needs. Definitely utilizing this company for our Generator needs!“

“We’ve had Brady Home Services do multiple projects in our home, from installing a water softener system, to overhauling a bathroom. The team is always professional and friendly. Plus they’re great at providing options and explaining what they’re doing and why.

We highly recommend them.“

“Bill Trombly Plumbing was able to service my boiler several days earlier than planned due to an opening in their schedule. Chris was knowledgeable and professional. Highly recommended!Service: Heating system repair“

“Quick response, very helpful, friendly, and wonderful service! Encouraged us that our 40 year old A/C is doing well and just needed a simple part that he had with him. Tested pressures, temperatures, and cleaned everything.“

“Always prompt, efficient and respectful. They do a great job and always show up when they say they will.“

“I am remodeling and doing upgrades to my childhood home and it was time to replace the 40 year old natural gas boiler and 25+ year old hot water tank. Back when the boiler was installed it only had a efficiency of 67%+-. As you can imagine after working hard in all these New Hampshire Winters throughout the years I'm sure the efficiency has dropped dramatically(as I could tell by my energy bills). I knew I was on borrowed time with both these units and figured lets get this done during the Summer before the worst would happen during the Winter. As most people in Southern NH knows MASI's has been here for a long time(over 60 years)and is a family run business. Being a business owner myself I know that customer service is a key part to business. Anyone can sell you product, but it's the service and focus on detail that makes a difference. When I fist called and spoke with Keith he was extremely knowledgable and helpful with what my heating/hot water needs would entail. He then came to my house to access those needs and made some recommendations. We both agreed a combi unit (both heat & hot water)would be the best efficient & economic way to go. We went over the different models and I decided on the Bosch Singular Combi Boiler. A bit more expensive than others but I am very familiar with the Bosch family of products and have many in my home. Including all Thermdor kitchen appliances which is part of the Bosch family. Keith also took care of the town permit I needed and filled out my EngeryStar rebate to submit. The installation went smoothly. Julio, Kayden & Dave worked seamlessly to get everything in stalled correctly. All the copper piping was connected with the industries best fittings, Viega press fittings. This is the latest in technology to pipe fitting. No Soldering required. Less mess and no flames.
Another nice feature to this system is there is nothing on the floor of my basement. Everything is attached to the wall. The whole installation process took 2 days work. I really didn't realize all that was entailed to this installation. A lot of work for these 3 men. All 3 men where extremely polite and were more than happy to answer any questions I had. After my new combi boiler was installed they also replaced one of my outdoor water spigots which was corroded and had stopped functioning.

When all was done everything was clean & tidy. The only way I knew they were in my home is I had all new equipment.

I can't tell you how satisfied I am with MASI Plumbing & Heating.
It's nice to know we have reputable company in our backyard.“

“Knowledgeable, responsive, diligent, thorough, excellent workmanship, and saved us a lot of money.Thank you Jason for quickly getting us in hot water. ;)A big thumbs up to Extra Time Plumbing & Heating!“

“Erik is as good as it gets for timely service and advice at a reasonable cost!

Erik and staff have been servicing my home AC units for the last 10 years, and at my local business where it's critical that customers are comfortable he is always there very promptly as I have needed him. I appreciate him making time in his schedule and very fast turnaround!“

“Jason was professional and thorough with the work at my house. I would absolutely recommend Conerstone for clean quality work. I had 21 vents cleaned.“

“Best and most honest person I’ve ever had in my house very knowledgeable. Recommended to all my family.“

“Brookside is great! Very professional, prompt and conscientious. Johnathan does a fabulos job, every visit.“

“Excellent service, highly recommend! Our AC stopped working, the guy came in quickly after service call. He worked really hard to fix it, so if you need plumbing or heating services, you can rely on them.“

“I came into the trades because I wanted meaningful work, and this place delivers. The culture is safety-first and do-it-right, not “hurry up and hope.” My truck is stocked, the support line actually answers, and if a job needs extra time to be done properly, management backs the techs. That matters.

What I love most is how we treat customers -show up when we say we will, keep the work area clean, explain what we’re doing, and leave things better than we found them. Winter gets busy (no surprise), but the team pulls together and nobody’s asked to cut corners. Training and mentorship are real, not just buzzwords.

If you’re a customer: you’ll get honest recommendations and solid work.
If you’re a tech thinking about applying: expect good people, clear procedures, and a company that lets you take pride in your craft. Couldn’t ask for more.“

“This guy is great, calls back, is responsive and is very technical, he knows modern HVAC heat pump systems thoroughly.

The original dealer that sold me my equipment in six years has never once returned a call, even for annual service, not a great feeling. Highly recommend Zibby.“

“Great customer service!! Jim went above and beyond!! Would recommend this company for all plumbing needs!!! Very satisfied customer!!! Thank you for all you did!!“