Recent Jobs and Reviews
Job Locations and Reviews
Adam P.
Installation of a new oil furnace to replace the existing system. Ductwork & Airflow Improvements: Return Air Upgrade: We will completely redo the return drop and install a new, larger 24" x 10" floor register. This is critical to ensure the new furnace has adequate return air "to breathe" and operate efficiently. Airflow Adjustment: Depending on the final airflow measurements, we may need to open up basement supply runs that were previously closed off or install an additional register to guarantee proper static pressure and comfort. Filtration: A new AirBear filtration cabinet will be installed to improve air quality and protect the new equipment. Oil & Venting Connections: A new coated oil line will be installed running from the existing Tigerloop to the existing oil tank. The existing 6" venting will be adapted to connect to the new furnace. Electrical & Code Compliance: Our electrical team will install a dedicated emergency shut-off switch at the top of the stairs, bringing
Loudon, NH 03307
Review
Excellent Service
Jack D.
Could not find an issue with tankless water heater. It was operating properly with each plumbing fixture in the home. I cleaned inletscreen, it was dirty but I dont think it was dirty enough to cause an issue.
Londonderry, NH 03053
Qwentin G.
Apon arrival I found that the first floor zone was calling. I found that the circulator pump had burned out. The circulator pump was extremely hot. I replaced it with a new pump. I bled all the air out of the system. Both returns came back very hot.
Concord, NH 03301
Jack D.
Repaired leaking gas fitting. I checked every other fitting with leak detector and they were all set. I checked your propane tanks and they are almost empty.
Hollis, NH 03049
Review
Very nice and personable person. Explained everything to me in a way I could understand
Review
I never thought I’d meet anyone as cool nice and kind as Mark but Jack was amazing. He took on the dirty job.. No problem He was super communicative and explained everything. I’m really grateful to have Granite State Mechanical on speed dial.
Jack D.
Large root blockage 38 feet out from basement cleanout. I remove roots and restored flow. I reccomend flushing root destroyer and having camera inspection and going from there.
Nashua, NH 03064
Qwentin G.
Completed the water heater maintenance today. I flushed out the water from the water heater. I added in water and made sure it came out clear. I pulled the anode rod and wiped it down with a rag, it was in good condition. I completed the whole house plumbing inspection. I looked at the water lines, the drain lines and the fixtures. The only two things that I found was the master bedroom sink is starting to leak from the drain. The sink plug I wasn't able to get back in. Other than that everything look great. We will write up an estimate to make those two repairs and send it over to you by the end of this week.
Nashua, NH 03062
Qwentin G.
Completed the water heater maintenance today. I drained down the water heater. Next I pulled out the annod rod and I wiped it down with a rag. The anode rod was in very good condition. I adjusted the clients mixing valve to 120°F. I completed the plumbing inspection and I found that the first floor shower drain was leaking really badly. I also found that the first floor and second floor shower was coming out at 98°F. We will have to replace the shower cartridges. The aerator on the first floor bathroom got plugged up. After cleaning it I went to put it back in and the threads were stripped on it, so we will have to replace that as well. Other than that all the water lines, drain lines and fixtures looked great.
Hooksett, NH 03106
Jack D.
Snake upstairs tub drain. Fix squealing sink by cleaning aerator. Complete furnace & water heater planned maintenance. Please see each maintenance form for details of todays servicing. Thank you!
Nashua, NH 03062
Review
Jack was once again on time, diagnosed the problem quickly and fixed it. All GSMS staff are courteous and extremely professional. I wouldn’t go with anyone else.
Qwentin G.
Completed the whole house plumbing inspection. All the drains, water lines and fixtures looked great. I completed the rinnai water heater maintenance. I flushed the unit with cleaner for 40 minutes. After that I flushed around 10 gallons of water through it. I broke the inlet filter screen by accident so I replaced it with the new one. Inside of the water heater looked great no rust or corrosion. I replace the whole house sediment filter with a client supplied filter. Checked for leaks at the end and everything looked great.
Epping, NH 03042
Jack D.
Replace corroded pop up rod for bathroom sink near kitchen.
Merrimack, NH 03054
Review
Excellent work
Review
Great service!
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.
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.
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.
-
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 -
Goffstown, NH -
Greenland, NH -
Hampstead, NH -
Hampton, NH -
Hollis, NH -
Hooksett, NH -
Hopkinton, NH -
Hudson, NH -
Lee, NH -
Litchfield, NH -
Londonderry, NH -
Madbury, NH -
Manchester, NH -
Merrimack, NH -
Nashua, NH -
New Boston, NH -
Newmarket, NH -
Northfield NH -
Northwood, NH -
Pelham, NH -
Pembroke, NH -
Raymond, NH -
Rochester, NH -
Salem, NH -
Sandown, NH -
Stratham, NH -
Warner, NH -
Weare, NH -
Windham, NH
