Recent Jobs and Reviews
Job Locations and Reviews
Qwentin G.
I completed the oil boiler maintenance today. I replaced the oil filter, the pump strainer and the nozzle. I pulled the flue pipe off and remove the top to access the heat exchanger to be able to clean it. Lastly, I performed a combustion analyzer test to check for CO, CO2 and oxygen levels and everything was running great! The boiler had a bunch of the accessories replaced a few years ago and everything still looked new.
Londonderry, NH 03053
Mark D.
Replacement of the existing oil-fired boiler with a new oil-fired boiler. The system will remain a single-zone setup, as currently configured. The recently replaced expansion tank will be reused, but all other components will be replaced and updated to meet the new boiler's design requirements. The existing cased copper oil line, which runs along the foundation wall, will also be reused. A new double-wall oil tank will be installed, connecting to the existing oil fill and vent lines. The new system will be piped to allow for a future indirect hot water heater to be added when the existing hybrid heat pump water heater fails.
Newmarket, NH 03857
Jack D.
Today I completed a maintenance on your Weil-Mclain oil boiler. Everything went great and there are no necessary repairs at this moment. I wired your nest common maker device and tested operation. Thank you.
Manchester, NH 03104
Qwentin G.
Completed the gas furnace maintenance today. I started off with cleaning the trap and condensate pump with cleaner. I pulled and cleaned the flame sensor. I checked the wiring connections and everything looked good. The client replaces his own filters. I replaced the humidifier pad and put the humidifier into winter mode. I checked incoming and outgoing gas pressures and everything was according to manufacture specifications. Ran the unit in high and low fire and performed a combustion analyzer test to check for CO, CO2 and oxygen levels and everything was according to manufacture specifications. The client noticed that their hot water recently started to get really hot. I found that the mixing valve was sticking. I ended up freeing it up and adjusting the water temperature to 122°F. I let the client know that if they notice their water temperature change again that we just need to replace the mixing valve.
Bedford, NH 03110
Mark D.
Replaced trip lever/tip up
Manchester, NH 03104
Mark D.
Pm viessmann boiler
Manchester, NH 03102
Jack D.
Restart boiler. It was sitting all summer and needed to be restarted. We reccomending changing controls from lead lag to cascading. This will prevent having boiler 2 sitting.
Manchester, NH 03104
Qwentin G.
Completed the gas boiler maintenance today. Cleaned the burner tubes off. Cleaned the flame sensor. Checked incoming and outgoing gas pressures and everything was according to manufacturer specifications. Ran the unit and performed a combustion analyzer test to check for CO, CO2 and oxygen levels and everything was running great.
Hooksett, NH 03106
Jack D.
Lennox gas furnace maintenance. Replace toilet fill valve. Fix humidifer. Install hole home sediment water filter. Gina from the office will call to schedule the garbage disposal and supply valve replacement. Thank you!
Merrimack, NH 03054
Mark D.
Checked indoor air ahu and pure pro filter and blub
Londonderry, NH 03053
Review
Qwentin serviced our furnace and installed our new Nest unit. He was friendly, attentive and thorough
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Only great service from Jack with GSMS. Longtime customer!
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Qwentin performed annual maintenance on our furnace. He kept us informed on how the process was going and closed up the basement when the work was completed. A very professional job!
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Always great service with GSMS
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Everything about the bathroom is great. Shower door works fine and looks good. I want to thank Mark and GSMS for doing a great job and also for being very neat, cleaning up each day after the work was done. The new bathroom is a perfect addition to our home. Thank you for all time helping to plan the bathroom.
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Great service , personality and thorough
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Highly recommend!
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5 🌟 excellent knowledge of produce and very professional
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GSMS is my go to for all my air, heating and plumbing! Great service, great price and great people. Qwentin Gauvin has done the last three services at my home and he is always happy, professional and does a fantastic job!
Review
Quentin was awesome he was very professional, respectful and extremely knowledgeable and competent. Great personality. and exhibited interpersonal and communication skills.
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!
Jack was on time and professional upon his arrival to my home. He quickly diagnosed the problem with my hot water heater and had it fixed on the same day. Granite State Mechanical offers unsurpassed customer service and expertise in the area of heating plumbing and cooling. I tell all my neighbors how great they have treated me, and I am so glad I chose GSM to install and service my home HWH and Mini split.
Response from GSMS Air•Heating•Plumbing:
We thank you for sharing your positive experience. It made our day.
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