Proudly serving New Hampshire homeowners with local heating, air & plumbing services.
At GSMS, we are proud to serve New Hampshire with our comprehensive range of HVAC and plumbing services. As a family-owned business with 35+ years of experience, we have built a reputation for excellence, reliability, and outstanding customer care. Our skilled technicians are dedicated to providing top-quality repairs, installations, and maintenance tailored to meet the unique needs of New Hampshire homeowners.
From air conditioning and heating services to plumbing repairs and installations, we ensure your home remains comfortable and efficient year-round. Our commitment to quality and customer satisfaction sets us apart as the trusted choice for all your home comfort needs.
Explore our service area below, read reviews in your city, and see why homeowners across New Hampshire trust GSMS for their HVAC and plumbing needs.
Contact us online today or call 603-424-8258 to schedule your service and experience the GSMS difference.
Recent Jobs and Reviews
Job Locations and Reviews
Today I completed a maintenance on the HTP Boiler according to the manufacturer annual maintenance instructions. I found the heat exchanger to have a leak. I am having the salesperson check the warranty. I shutoff the gas and electric to the boiler to be safe. I will come back with space heaters. I pumped the descaler through the domestic hot water heat exchanger per manufacturer’s recommendation. The color of the descaling solution in the bucket indicated that the heat exchanger definitely had some buildup! You should replace the boiler temperature and pressure relief valve along with the boiler hyvent. I emailed a quote to perform all of the recommended repairs if the boiler heat exchanger is covered under warranty .
Tightened garbage disposal and put drain back together.
Need new zone panel,bypassed panel system running on one zone
Replaced gas valve.Gas valve under warranty.labor charge
The propane furnace maintenance on your Lennox was performed today. The furnace was gone through and checked up and cleaned. It is ready for another season of dependable and safe heating. Thank you!
3 Kohler biscuit Cameron toilets
New relief valve, expansion tank, hy-vent, and auto fill valve with backflow prevention valve. Fill boiler with water + antifreeze and purge all heat zones.
Replaced 20 amp breaker
Install flow by moen Installation of Flo by Moen to home. Use nearby electrical outlet for power.
I repaired a 14-year-old Bradford White gas water heater in Merrimack, NH. The unit had an issue with the thermocouple, which was preventing the pilot light from staying lit. I replaced the old thermocouple with a new OEM part and cleaned the burner assembly. After testing, the water heater is now functioning properly and providing consistent hot water. The homeowner was advised on future maintenance due to the age of the unit.
Thank you for your review, Nancy! We appreciate having 5-Star clients like you! 🙂
Thank you Linda!! We're proud of our friendly team of Specialists.
Thank you for your kind review, Sue!! We're so happy to have you a part of our GSMS family.
Many thanks for taking the time to share your feedback with us. We’re very happy to hear that we met your expectations!
Many thanks for taking the time to share your feedback with us. We’re very happy to hear that we met your expectations!
-
Amherst, NH -
Atkinson, NH -
Auburn, NH -
Barrington, NH -
Bedford, NH -
Bow, NH -
Epping, NH -
Goffstown, NH -
Hollis, NH -
Hooksett, NH -
Hopkinton, NH -
Hudson, NH -
Lee, NH -
Madbury, NH -
Manchester, NH -
Merrimack, NH -
Moultonborough, NH -
Nashua, NH -
New Boston, NH -
Newmarket, NH -
Pelham, NH -
Pembroke, NH -
Raymond, NH -
Rochester, NH -
Salem, NH -
Sanbornton, NH -
Stratham, NH -
Warner, NH -
Weare, NH -
Wilton, NH -
Windham, NH