Recent Jobs and Reviews
Job Locations and Reviews
Qwentin G.
I was able to remove the old cracked leg and add a new one in. The unit was still pretty wobbly due to the concrete pad not being level. I used a rubber furnace block to shim the new foot. The unit is nice and sturdy now.
Stratham, NH 03885
Qwentin G.
Performed a deep cleaning on the mini split head in the IT room. I took a before and after video. Turned it back on to 64 degrees in cooling mode.
Londonderry, NH 03053
Qwentin G.
Replaced the failed gas valve that is covered under warranty. I adjusted the high and low fire gas pressures. I also ran a combustion analyzer test in high and low fire. This checks the units CO, CO2 and oxygen levels. Lastly I checked for leaks and everything was good.
Merrimack, NH 03054
Qwentin G.
Found that the sump pump was turning on but not pumping any water. After checking the check valve and the inlet screen on the pump I came to the conclusion that the pump had failed. After installing the new pump I tested the operation and it worked great with no leaks.
Hopkinton, NH 03229
Review
Adam & Quinn just left after finishing the installation of my new Lennox Air Conditioning unit. As always, they are very personable and professional. Adam explains everything to me before he leaves and I am very comfortable with my new system. I would not hesitate to recommend GSMS and have done so in the past.
Adam P.
We will replace the original system with a new high-efficiency Lennox system, upgrading from the existing 80% efficient furnace to a 90+% efficient model. The existing furnace vent will be capped off, and a new vent will be installed to exit through the side wall of the garage. This will be white PVC, which can be painted to match the exterior of the home. We can provide a photo of the proposed vent location for condo association approval if needed. The new system will be installed in the same location, with any necessary modifications to ensure a proper fit. Outside, a new condensing unit will be installed. The existing lineset will be flushed and re-used due to the limited accessibility of the installation path. A final site visit will be needed to confirm the most appropriate location for the outdoor unit. A new Wi-Fi thermostat will be installed, offering user-friendly control at home and the ability to monitor and adjust your system remotely while traveling.
Hooksett, NH 03106
Review
Qwentin was thorough and diagnosed the issue
Jack D.
Primary side of transformer shorted out. Caused by power issue on 3/17. I replaced and tested operation. We will order limit switches to replace to help prevent intermittent low voltage short issue.
Londonderry, NH 03053
Jack D.
Shower valve, 2 new space kick heaters, bleed lines.
Manchester, NH 03104
Adam P.
Project Overview Supply and install a new Lennox Signature Series (SLP99V) Variable Speed Gas Furnace. This system offers the highest level of precision, modulating its output in 1% increments to maintain exact temperatures while integrating seamlessly with the existing Rheem AC and new Lennox S40 smart controls. Scope of Work 1. Equipment Installation & Adaptation Furnace: Install Lennox SLP99V Variable Speed Gas Furnace. Coil Adaptation: Fabricate custom sheet metal transitions to mate the new furnace width and height to the existing Rheem evaporative coil (installed 2020). Return Drop: Modify the existing return drop to accommodate the new filtration cabinet. 2. Venting & Drainage Venting Upgrade: Disconnect existing 3" venting. Install new 2" PVC intake and exhaust piping, utilizing the existing path to the exterior termination point. Condensate Management: Eliminate the existing floor drain setup. Install a new condensate pump and route vinyl tubing to discharge water to
Sandown, NH 03873
Qwentin G.
I found that the fan limit switch was acting up. It is sticking and not allowing the blower to run long enough to cool down the heat exchanger. That is why it keeps short cycling. I'll send over an estimate to replace the fan limit switch.
Stratham, NH 03885
Qwentin G.
Found that one of the stand pieces is broken on the outdoor unit. I ran the unit in heat pump mode and everything operated perfectly. We will be reaching out to you for when we can come and replace the part.
Stratham, NH 03885
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Great service
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Excellent Service
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Excellent service and communication. A great family business.
Review
Quentin gave me all the information I requested and was exceptionally polite and did a through job. I highly recommend him and GSMS company !
Review
We use GSMS for all our bathroom remodels! Mark, Jack and Zak have been awesome to work with.
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Excellent service.
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Amazing service as usual!!!
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Professional service
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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