Recent Jobs and Reviews
Job Locations and Reviews
Jack D.
Furnace PM. Replace inducer and found high CO in combustion due to cracked heat exchanger.
Amherst, NH 03031
Review
Friendly and transparent. Explained all aspects of the service.
Mark D.
Possible crack heat exchanger,also combustion blower should be replaced
Nashua, NH 03064
Mark D.
Replaced pressure switch ,will stop back after my next call to check thermostat differential
Merrimack, NH 03054
Adam P.
Replacement of the existing unit and installation of a new Sterling Ensemble tub & shower unit. The new unit will be a right-hand drain configuration and will include a standard Moen Chateau polished chrome valve with a standard shower head and tub spout. For enhanced functionality, the shower arm will feature a Kohler Awaken transfer valve connected to a Kohler Awaken handheld shower with a 60" hose, all in matching polished chrome finish. Note: The interior water height of the new tub is 11", with the top of the tub sitting at 16". The existing waste and supply lines will be reconnected at the point-of-use. This installation includes all necessary plumbing materials and labor, but any carpentry finish work is explicitly not included.
Concord, NH 03301
Zak D.
3 filters
Merrimack, NH 03054
Jack D.
I could not find any issues eith the furnace. Gina will reach out to schedule an estimate with Zak.
Sandown, NH 03873
Qwentin G.
Found that the furnaces condensate pump had failed due to age. Replaced it with the new pump. Poured cleaner inside of it to flush the lines as well and tested operation. Everything was working great and no leaks.
Bedford, NH 03110
Qwentin G.
Completed the gas furnace maintenance today. I started off with checking all the wiring connections and everything looked good. Next I cleaned the flame sensor. I replaced the air filter with a client supplied filter. I vacuumed out the filter box and the furnace. I checked incoming and outgoing gas pressures and everything was according to manufacturer specifications. Lastly I ran the furnace in low and high fire and performed a combustion analyzer test. This checks the units CO, CO2 and oxygen levels. Everything was running great. We will reach out to schedule the appointment for the water heater and plumbing maintenance.
Bedford, NH 03110
Jack D.
Fix leaking vent
Concord, NH 03301
Review
Qwentin is a pleasure to have work at our house. He is friendly, informative, and clearly knows what he is doing.
Qwentin G.
Completed the Rinnai tankless water heater maintenance today. I started off with flushing cleaner through it for 35 minutes. After I flushed 10 gallons of water through it. I cleaned the water inlet screen. I vacuumed out the inside of the water heater. I checked incoming gas pressure and that was according to manufacturer specifications. I completed the plumbing inspection as well. I checked the fixtures and drains and the only leak that I noticed was the kitchen sink. When ran on cold water it leaks from the handle and the water gets in the cabinet. The client's step son is replacing the sink. I noticed that the house's water pressure was 85 PSI, which is high. I also noticed that the temperature and pressure relief valve on the Rinnai has been leaking. I will send over an estimate to add a pressure reducing valve and to replace the leaking temperature and pressure relief valve.
Manchester, NH 03109
Review
We had an issue with our furnace and called GSMS on recommendation from a friend. I called and spoke with Gina to schedule an appointment. (She is very pleasant with a great attitude!) A service specialist, named Qwentin, came out to assess the issue. Qwen is great! He spoke well and is quite knowledgeable. He explained the issue, proposed a solution and a provided quote to fix. Although he didn’t have the part, he indicated he would quickly leave, go get the part and come right back to install—- all in that same visit! Qwentin‘s customer service skills, along with everyone else I’ve spoken with at GSMS, are top-notch. Going forward, we will use GSMS for our Plumbing, Air, Heating needs.
Review
All was great.
Review
Jack from GSMS came today and serviced our tankless hot water heater. Excellent job as always
Review
We had a no heat issue. Qwentin diagnosed the problem and kept me informed of the process. He got the furnace running and told me what to watch for until the part comes in that will be the permanent fix.
Review
Arrived on time, organized equipment. Friendly, answered all my “many questions”. Adam made sure all the equipment was in working order. Excellent service.
Review
A+
Review
Always amazing service, every team member at GSMS has always been great and performed exceptionally great service.
Review
Excellent 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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