Your Trusted Plumbing, Heating and Air Experts in Nashua, NH
Since 1987, GSMS has been proud to offer top-notch HVAC and plumbing services to residents of Nashua, NH. With over three decades of experience, our family-owned business has built a reputation for excellence, reliability, and outstanding customer service.
Need AC repair, a local plumber or better indoor air quality for your home? Call 603-424-8258 to schedule your HVAC and plumber service or contact us online with any questions 24 hours a day.
Expert HVAC Service
We provide a comprehensive range of HVAC services, including air conditioning repair, replacement, and HVAC maintenance, as well as heating repair and installation services for furnaces and boilers. Our expert HVAC technicians are also skilled in installing and maintaining ductless mini-split systems, ensuring that your home stays comfortable year-round.
Heating and AC Repair and Replacement
At GSMS, we use only the highest quality products from leading manufacturers, guaranteeing efficient and long-lasting solutions for your heating and cooling needs. Whether you need a quick repair, a complete system installation, or regular maintenance, our team is dedicated to providing personalized service tailored to your specific requirements.
Don't let HVAC issues disrupt your comfort—call GSMS today at 603-424-8258 to schedule your AC repair or heating service in Nashua and experience the difference of working with trusted local professionals.
Local Plumbing Services
In addition to our heating and air conditioning services, we offer top-quality plumbing services to the residents of Nashua. With over three decades of experience, our family-owned business has established a reputation for trust, reliability, and exceptional customer care.
Water Heater Repair and Installation
Our local plumbing services include water heater repair, replacement, and maintenance for both tank and tankless models, ensuring your home has a consistent supply of hot water. We also specialize in kitchen plumbing, from faucet and sink installations to dishwasher and water line services.
In the bathroom, our expert plumbers handle everything from toilet and shower repairs to vanity plumbing and pipe replacement. We use only the highest quality materials and the latest techniques to provide efficient and long-lasting solutions for your plumbing needs.
Get the Best Plumbers
Don't let plumbing issues disrupt your daily routine—call GSMS today at 603-424-8258 to schedule your plumbing service in Nashua and experience the peace of mind that comes with working with trusted local professionals.
Don't belive us, see what your neighbors are saying about our HVAC and plumbing services below!
Recent Jobs and Reviews in Nashua, NH
Customers say: The reviews exhibit a positive sentiment, with a majority of customers expressing satisfaction with the services provided by GSMS. The recurring themes include praise for the quality of work, professionalism, responsiveness, and excellent customer service. Customers also appreciate the technicians' expertise, friendliness, and the overall positive experience they had with GSMS. Negative reviews are minimal and focus on specific issues or misunderstandings, which were promptly addressed by GSMS. Overall, the reviews suggest that GSMS is a reliable and trustworthy company that delivers high-quality services to its customers.
Our Local Reviews by City
- Amherst, NH (4)
- Atkinson, NH (1)
- Auburn, NH (1)
- Barrington, NH (13)
- Bedford, NH (16)
- Candia, NH (2)
- Chester, NH (1)
- Concord, NH (5)
- Derry, NH (2)
- Dover, NH (1)
- Durham, NH (1)
- Epping, NH (1)
- Gilmanton, NH (1)
- Goffstown, NH (4)
- Henniker, NH (2)
- Hillsborough, NH (1)
- Hollis, NH (9)
- Hooksett, NH (8)
- Hudson, NH (4)
- Lee, NH (1)
- Londonderry, NH (10)
- Manchester, NH (33)
- Merrimack, NH (19)
- Milford, NH (3)
- Moultonborough, NH (1)
- Nashua, NH (21)
- New Boston, NH (3)
- Northfield, NH (1)
- Northwood, NH (1)
- Pembroke, NH (1)
- Raymond, NH (1)
- Rochester, NH (2)
- Salem, NH (3)
- Sandown, NH (1)
- Stratham, NH (1)
- Tilton, NH (1)
- Weare, NH (4)
- Windham, NH (6)
Job Locations and Reviews
Excellent service as Ive always had from GSMS. I appreciate Jack's quick response and fix on a beautiful Friday spring afternoon!

Slow draining/ backed up kitchen and bathroom sink. Clear out drain with snake. Use lye to flush drain. Test drainage! All set. Thank you!
Mark is so awesome!! He can solve any problem
We count ourselves lucky for customers like you and look forward to working with you again in the future!

Replaced tub cartridge and kitchen faucet

Drain cleaning. Ran snake twice through sewer main. Snake wasn't long enough to clear blockage

I washed the outside coil with water. I then went inside and I cleaned the indoor coil with Dawn soap and water. I washed the air filters with Dawn soap and water as well. Lastly I tested to see the temperature coming out and it was 130°. Everything looks great.

Plumbing installation. Replaced a customer's garbage disposal. Tested it upon completion and it is working properly.

I found the garbage disposal to not turn on. I noticed the switch was very loose. The switch was bad and needed to be replaced. Once the disposal was getting power you could hear it humming. It was decently jammed up so I cleared it up! I tested it multiple times and all is well. Thank you!

I replaced the outdoor frost free faucet today. I checked it for leaks and all is well. I then performed a cleaning on the AC. All is well.

Pm on boiler,closet in front of boiler needs louver door if you put door there.Also need louver door on other side of boiler by hot water heater if you put door there.

I started off with checking all electrical connections inside and everything looked good. The client replaces his own filters. I cleaned the trap and condensate pump with cleaner. Next I went outside and washed the outdoor unit with water and then soap. I checked the electrical connections outside and everything looked perfect. Lastly I checked the operating pressures in heating mode since it wasn’t warm enough to do it in air conditioning mode. The pressures looked good.

Replace pressure sensor on York modulating natural gas furnace.
Excellent service
Mark and his family run a top tier heating and plumbing business. I would not go anywhere else. I have three houses and they take care of everything.
Did a very efficient job
We're so happy to hear that you had a great experience with us. Thanks for taking the time to leave a positive review.
Plumbing preventative maintenance
We thank you for sharing your positive experience. It made our day.
Excellent service.
We're so happy to hear that you had a great experience with us. Thanks for taking the time to leave a positive review.
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!
The visit showed what was the problem and will soon be resolved.
I had 3 furnaces that needed repair work done. I received an estimate, approved the work which was scheduled and Jack got the repairs done.
Mark is the best! Always takes care of the issues thoroughly!
We are so grateful for your 5-star review. Thanks for sharing your rating with us and the community.