Recent Jobs and Reviews
Job Locations and Reviews
Adam P.
Replacement of the existing heating and cooling system with a new high-efficiency Lennox system. The new system will maintain the same footprint, utilizing the existing poured concrete pad outside and the existing location for the furnace inside. The new furnace venting will feature a two-pipe design on the exterior instead of the existing concentric one-pipe design. The existing bypass humidifier will be reconnected to the new system, and a new right-angle AirBear unit will be installed for enhanced air filtration. For improved performance, the existing zone dampers will be replaced with new dampers as part of installing our new Lennox Smart Zoning System. This system allows the heating and cooling unit to precisely control the zoning, only delivering the exact amount of energy needed per zone. This approach maximizes efficiency and increases comfort by delivering the exact airflow needed for quiet operation. Our Lennox Smart Zoning uses our Lennox smart thermostats, which offer a u
Auburn, NH 03032
Review
Great service!
Qwentin G.
Downstairs bathroom sink trap has a very small leak when water is ran. I added a emergency shut off tag to water meter and oil tank. All other plumbing looked great in the house.
Manchester, NH 03104
Qwentin G.
Found that the furnace exhaust pipe was condensing and water was running down the pipe and getting inside of the house. This is due to too much piping outside that is uninsulated. Client approved the estimate to properly revent the intake and exhaust pipes.
Raymond, NH 03077
Jack D.
Boiler repairs.
Concord, NH 03301
Qwentin G.
Completed the gas steam boiler maintenance today. I started off with checking all the wiring connections and everything was good. Next I pulled out the burner tubes and I cleaned them. I vacuumed the inside of the burner box. I cleaned the flame sensor. I checked incoming and outgoing gas pressures and everything was according to manufacturer specifications. I drained down all of the water in the boiler. I found that the low water cut off wasn't sensing that there wasn't any water in the boiler. When I pulled the probe out to clean it, it was extremely dirty so it wasn't able to sense that the water level was low. I found that there was no water in the sight glass. The valves had been shut and the ports were extremely blocked up. I found that the top of the sight glass had been broken, I'm assuming that's why the valves were shut. I pulled the pigtail off of the boiler and that was extremely plugged up as well. I brushed it out and cleaned it out with water. Next I replaced the sight g
Manchester, NH 03102
Review
Working with GSMS was a fantastic experience. There was attention to detail from the estimate to the clean up at the end of the project. Especially during the planning process, Zak helped me evaluate different options, quickly readjusted as I changed my mind... without ANY pressure! Superior, prompt communication during the whole (and post) process.
Qwentin G.
Replace leaking high vent and replace leaking pressure relief valve. Ran boiler and made sure both returns came back hot.
Manchester, NH 03104
Jack D.
Fix leaking tub drain. Disassembled and revealed drain. Thank you!
Merrimack, NH 03054
Qwentin G.
Completed the oil boiler maintenance today. I replaced the oil filter, pump strainer, and the nozzle. I brushed and vacuumed out the heat exchanger. All the boiler accessories looked good. I ran the unit and performed a smoke test and got zero smoke. Lastly I performed a combustion analyzer test that checks the units CO, CO2 and oxygen levels. The boiler was running great.
Litchfield, NH 03052
Jack D.
Replace Kohler powerful handle. Install salon sink sprayer. Complete furnace maintenance. Everything went great. Please see the Furnace Maintenance sheet for details of todays service.
Manchester, NH 03103
Qwentin G.
I found no gas leaks at the furnace in the workout room. I used my gas sniffer and found no leaks on the gas pipe or the gas valve. I rechecked my repair and there was no Co present inside of the furnace cabinet. I also performed a combustion analyzer test when the unit was running and it was running good. Only when the unit turns off you can smell a little odor of propane which I have found normal on propane furnaces. The smell is the mercaptan when the unit shuts off. Mercaptan is a harmless odor that they add into propane to detect gas. The furnace is safe to operate.
Bedford, NH 03110
Review
No heat emergency situation handled immediately on a Sunday evening. Great service!
Review
Excellent service
Review
Qwentin did the annual maintenance on our furnaces. He checked everything thoroughly via checklist and itemized was done.
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.
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.
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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