Recent Jobs and Reviews
At a glance
GSMS Air•Heating•Plumbing has completed 10 jobs in September 2026.
The 25 customer reviews shown here average 5.0 out of 5.
The most recent job was on September 25, 2026.
Recent work covers Manchester, NH, Amherst, NH, Bedford, NH, Bow, NH and Greenland, NH.
Job Locations and Reviews
Loose wire connection in pump.
Checked incoming and outgoing gas pressures and everything looked good. Performed a combustion analyzer test and all my readings were good as well. I noticed that the low pressure switch is faulty and was never hooked up into the circuit from when the unit was installed. We will send over an estimate to replace the low pressure switch.
Excellent service and very knowledgeable technician.
Gas leak found at oven gas connector. Replace with new appliance connector.
Replaced the heat exchanger. I checked incoming and outgoing gas pressure and that was according to manufacturing specifications. I performed a combustion analyzer test and the unit was running great. Lastly I used my CO detector and went around all the sealed spots and there was no CO detected.
Boiler PM
Oil Burner Maintenance.
Remove toilet and reset
I found the boiler pump to not be working due to air being stuck in the system. I purged the zones out and fixed a loose connection on the boiler pump. I also fixed the exposed wiring on the HW tank pump. I recommend replacing the boiler pump with a more reliable and robust pump. We have sent an estimate for that replacement. Thank you.
Great service and communication!
Completed the oil boiler maintenance today. Everything went great. Please see the attached form. I also replaced the air vent that had failed.
Great service from start to beginning. Replaced my 35 year old System 2000 with the new version. Very impressed with the quality of work. Will definitely be using them from now on. Highly recommend! GREAT COMPANY.
This proposal outlines the direct replacement of your aging Energy Kinetics EK-1 system. Because you already know and love the efficiency of the System 2000, we will be upgrading you to the modern equivalent: the brand-new Energy Kinetics EK-1 "Frontier" boiler. Additionally, we noted that your current hot water storage tank was replaced back in 2021. Because these tanks typically carry a 6-year warranty, it is quickly approaching the end of its guaranteed lifespan. Instead of waiting for it to fail a few years down the road, we highly recommend proactively replacing it now alongside the boiler. This ensures your entire mechanical room is 100% brand new, giving you total peace of mind and zero worries for years to come. Scope of Work 1. High-Efficiency Boiler Upgrade The Boiler: We will safely remove your old equipment and install the new Energy Kinetics EK-1 Frontier boiler in the exact same footprint. Whisper-Quiet Operation: The new Frontier model features a specialized "fresh
Jack was knowledgeable and personable
Excellent and professional service
Mark is careful, thorough, and has very helpful suggestions.
Great service as always. Thank you so very much for squeezing us in! We are very grateful.
Excellent service
Jack was very professional, courteous, personable and thorough. Definitely at the top of my list for any future work needed and routine maintenance.
Adam and his team were on time each day, courteous, willing and able to answer all our questions. The system was flawlessly installed and we are beyond happy!
Love dealing with this company. Their techs are always prompt, efficient and courteous. We've been happy to be their customer since 2010.
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.
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 service again. On time and professional. I highly recommend GSMS.
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.
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!
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Amherst, NH -
Atkinson, NH -
Auburn, NH -
Barrington, NH -
Bedford, NH -
Bow, NH -
Candia, NH -
Chester, NH -
Concord, NH -
Deerfield, NH -
Derry NH -
Dover, NH - HVAC & Plumber -
Durham NH -
East Kingston, NH -
Epping, NH -
Epsom, NH -
Exeter, NH -
Gilford, NH -
Gilmanton, NH -
Goffstown, NH -
Greenland, NH -
Hampstead, NH -
Hampton, NH -
Henniker, NH -
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Hooksett, NH -
Hopkinton, NH -
Hudson, NH -
Lee, NH -
Litchfield, NH -
Londonderry, NH -
Madbury, NH -
Manchester, NH -
Merrimack, NH -
Milford, NH -
Moultonborough, NH -
Nashua, NH -
New Boston, NH -
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Northfield NH -
Northwood, NH -
Pelham, NH -
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Rochester, NH -
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Tilton, NH -
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Windham, NH -
York, ME
