Recent Jobs and Reviews
Job Locations and Reviews
Mark D.
We replaced the pump bracket assembly with a replacement that was found in the basement. There were a few issues encounter such as seized bolts and one that had to be drilled out and tapped. We were able to get it replaced and checked for operation. You're all set. The smaller boiler on unit 115 needs a new expansion tank and relief valve. The relief valve is dripping water and the expansion tank is water logged.
Nashua, NH 03060
Jack D.
I did not find any issues with the hot water system.
Manchester, NH 03104
Jack D.
Replace broken basket strainer. Test for leaks. All set thank you!
Manchester, NH 03102
Mark D.
Install washer and dryer on first floor,remove gas line to basement dryer,remove washing machine drain and check exhaust fan.
Deerfield, NH 03037
Qwentin G.
Completed the HRV maintenance today. This involves washing the washable filters with soap and water. I pulled out the heater core and washed that out with soap and water as well. I vacuumed out the inside of the HRV. I used soap and a rag to clean it. I reconnected the drain and tested the operation. Everything was working as it should.
Deerfield, NH 03037
Jack D.
Replace gas valve under Lennox warranty. Tested operation according to oem requirements. All set, thank you!
Bedford, NH 03110
Adam P.
Scope of Work: Replacement of the failed Burnham IN6 gas-fired steam boiler with a new high-efficiency SteamMAX 150k Gas Steam Boiler. Installation Details: The new boiler will be professionally piped into the existing system design to ensure proper steam distribution. All necessary connections (steam supply, condensate return, gas piping, exhaust venting, and electrical) will be remade to the new unit. The existing failed boiler will be disconnected, removed, and properly disposed of. Manufacturer Goodwill Rebate ($1,800): US Boiler Company has agreed to provide a goodwill rebate of $1,800 to the client upon replacement with this new boiler. Important Process Note: This rebate is a direct transaction between the client and the manufacturer. The client is responsible for filing the necessary paperwork directly with US Boiler Company, who will mail the check directly to the client. GSMS is not involved in the processing of this rebate nor responsible for the payment.
Hudson, NH 03051
Review
The experience started with Gina in the office who was very responsive and accommodating and made the scheduling process super efficient and friendly. Then Mark came and brought his expertise to my home and systems to point areas of installation failures by the company that installed my system. Just using the basic manual to point out how they cut corners. Mark spent the time to correct the exhaust piping to fix leaks and improve air flow. He was friendly and accommodating.
Jack D.
Had to tap out corroded end of previous shower arm. It was pretty well stuck. I eventually was able to remove it and install the new arm to the previous rain head. I ran the shower to look for leaks and it looks all set. Thank you.
Londonderry, NH 03053
Mark D.
Replace hot water heater
Madbury, NH 03823
Qwentin G.
I completed the condensing gas boiler maintenance today. I started off checking all the electrical connections, everything looked good. I pulled the flame sensor out and I cleaned it. I checked all accessories and everything looked great. I pulled the trap out and I cleaned it and primed it. I flushed the condensate pump with cleaner. I cleaned out the boiler magnet and I added in Fernox Protector F1. Lastly, I ran the boiler in low and high fire and performed a combustion analyzer test that checks the units CO, CO2 and oxygen levels. The boiler was running great.
Manchester, NH 03102
Review
Whenever Mark is on the way, you know it’s gonna be fixed correctly. He is awesome!
Review
Mark is always very professional and clearly communicates all options. He and his team are able to accommodate us and get the job done in a timely manner. THANK YOU!
Review
Arrived on time. Work was completed timely. Cleaned up afterwards. Very pleased with the service.
Review
GSMS is a great Family owned Company to work with. I am very happy with my new Boiler heating system. Zak explained all my options and was prompt to call back with any questions I had. Adam, the lead Technician was outstanding with the installation. Gina was great coordinating the scheduling. Mark also came out for a final inspection. You can tell they take pride in their work! I would definitely recommend them.
Review
Jack was prompt and did a great job tuning our furnace.
Review
Very happy with the job done.
Review
Did annual maintenance on the furnaces so we are all set for winter!
Review
Did annual maintenance on the furnaces so we are all set for winter!
Review
Great seeing Mark again.
Love dealing with this company. Their techs are always prompt, efficient and courteous. We've been happy to be their customer since 2010.
Response from GSMS Air•Heating•Plumbing:
Thank you so much for the kind words and for being part of the GSMS family since 2010! It means the world to us to have earned your trust over the years. I’m proud of our team for continuing to deliver the kind of service that keeps clients like you coming back. We truly appreciate your loyalty and support. – Zak D., Second-Generation Owner
Qwentin was on time, very friendly and professional. He was able to identify the issue, communicate it effectively, and then fix it. Highly recommend.
Response from GSMS Air•Heating•Plumbing:
Thank you so much for the kind words and for trusting GSMS to take care of your home. Qwentin is a rising star on our team, and it means a lot to hear that his professionalism and communication made a strong impression. As a local, family-run business, we’re grateful for your recommendation and honored to have earned your trust. – Zak D., Second-Generation Owner
Great water heater service. On time and professional l He gave me some helpful tips on other water related issues. Highly recommend GSMS.
Response from GSMS Air•Heating•Plumbing:
Thank you for the great review! I’m glad to hear our Specialist was able to get your water heater squared away and offer some extra tips while he was there. We always aim to go beyond just the repair, and I really appreciate you taking the time to share your experience. Thanks for choosing GSMS — it means a lot to our family and our team. – Zak D., Second-Generation Owner
top notch service, always professional. would recommend to anyone needing HVAC service, repair or install.
Response from GSMS Air•Heating•Plumbing:
It was a pleasure serving you and your family. Thank you for sharing your kind words with us. It means the world to us and to our entire team!
Had an issue with our heat pump. Reached out for assistance and they had someone on site that afternoon. Problem was resolved quickly. Super friendly service. The tech was exceptionally friendly and an excellent communicator. Highly recommend
Response from GSMS Air•Heating•Plumbing:
It was a pleasure serving you and your family. Thank you for sharing your kind words with us. It means the world to us and to our entire team!
Adam, Quin and Mark did a wonderful job installing my replacement oil boiler and oil tank. I have trusted GSM for 3 installs at my house because of their professionalism, workmanship, honesty, transparency and integrity for how they conduct their family business. Everyone who has worked at my house has always been informative, on time and respectful. I would recommend GSM to anyone who needs to have major plumbing or heating/cooling done in their home. Gina in customer service is the best at relaying information and gets back to you in a timely fashion. Zak is wonderful to work with and the entire team at GSM treats you with kindness. Thank you again for another wonderful experience because when it comes to your home it is one of the largest investments you will make in your life, and I trust GSM to be there for me in the future.
Response from GSMS Air•Heating•Plumbing:
We thank you for sharing your positive experience. It made our day.
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