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Nashua, NH

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

Rated 4.8 out of 5 stars based on 17 customer reviews

Customers say: The reviews exhibit a positive sentiment towards Granite State Mechanical Services (GSMS). The majority of the reviews are positive, highlighting the quality of service, professionalism, and expertise of the staff. Customers appreciate the prompt and efficient service, with many expressing satisfaction with the work done. Positive reviews mention the friendly and knowledgeable technicians, the cleanliness of the installation, and the reasonable prices. Customers also emphasize the trustworthiness and reliability of GSMS, stating that they are the only plumber they will ever need. The positive reviews often mention specific individuals, such as Jack, Mark, and Quentin, who are praised for their knowledge, courtesy, and quality of work. However, there are a few negative reviews, which mainly focus on issues related to scheduling or communication. Customers express frustration with delays or unfulfilled promises, but these negative reviews are outweighed by the positive ones. Overall, the sentiment of the reviews is positive, with customers expressing satisfaction with the services provided by GSMS.

Job Locations and Reviews

Mark D.
Mark D. Checked in
Replaced outside faucet
Nashua, NH 03064
Mark D.
Mark D. Checked in
40 gallon heater
Nashua, NH 03063
Mark D.
Mark D. Checked in
No signs of toilet or shower leaking.looks like it's leaking by side of tub where it meets the floor .Told customer to recault floor by tub
Nashua, NH 03064
Mark D.
Mark D. Checked in
Tuned up 2 boilers
Nashua, NH 03064
Mark D.
Mark D. Checked in
Pm on hot water heater ,replaced expansion tank it was water logged.No charge for labor only tank
Nashua, NH 03063
Review
Did a very efficient job
Paul - Nashua, NH 03062
Response from GSMS Air•Heating•Plumbing:

We're so happy to hear that you had a great experience with us. Thanks for taking the time to leave a positive review.

Jack D.
Jack D. Checked in
Replace Toilet with Kohler comfort height round bowl.
Nashua, NH 03062
Adam P.
Adam P. Checked in
Replacement of existing failed York furnace. New high-efficiency 99% efficient gas-fired furnace will be installed. Current A/C coil will be supported to slide in the new furnace. Since we installed the Signature Collection A/C system, it is smart communicating equipment. We will install our Lennox Smart Zoning system which will allow for the thermostat to control each zone's airflow. This delivers the exact amount of heating or air we need per zone. This will require new thermostats installed - the main thermostat will be an s40 which will act as the "smart hub" of the system and the other zone will be a standard touchscreen Lennox thermostat. New zone dampers will be installed (as long as accessible) to bring zoning up to new installation for worry-free usage. New venting will be replaced due to age and condition. We will add fresh air to the system to bring up to standards. A Trion AirBear filtration unit will be installed on the return drop to allow for better filtration.
Nashua, NH 03062
Mark D.
Mark D. Checked in
Snaked kitchen drain
Nashua, NH 03063
Review
Plumbing preventative maintenance
Paul - Nashua, NH 03062
Response from GSMS Air•Heating•Plumbing:

We thank you for sharing your positive experience. It made our day.

Review
Excellent service.
Laura - Nashua, NH 03060
Response from GSMS Air•Heating•Plumbing:

We're so happy to hear that you had a great experience with us. Thanks for taking the time to leave a positive review.

Jack D.
Jack D. Checked in
Tankless water heater flush. The flush removed buildup to restore efficiency and ensure smooth operation. While at the home we also troubleshot a faulty humidifier, identifying a clogged filter as the cause of poor performance. After flushing the heater and replacing the filter, both systems are running optimally, providing reliable hot water and improved indoor air quality.
Nashua, NH 03060
Jack D.
Jack D. Checked in
Plumbing inspection at a residential home. I completed a full plumbing inspection and repaired the downstairs shower handle. I also assessed the basement toilet and determined it needs replacement. An estimate for the new toilet installation will be sent soon.
Nashua, NH 03062
Review
The visit showed what was the problem and will soon be resolved.
Paul - Nashua, NH 03062
Review
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.
Midtown Housing - Nashua, NH 03064
Review
Mark is the best! Always takes care of the issues thoroughly!
Mark - Nashua, NH 03062
Response from GSMS Air•Heating•Plumbing:

We are so grateful for your 5-star review. Thanks for sharing your rating with us and the community.

Review
Had a space heater that stopped working. Jack resolved the problem and got it working again.
Oakwood - Nashua, NH 03060
Response from GSMS Air•Heating•Plumbing:

Thank you for the wonderful review and for taking the time to share your feedback.

Review
Great communication and service is always top notch.
Alyssa - Nashua, NH 03062
Review
Great service as always!
Paul - Nashua, NH 03063
Review
I needed a new dryer vent duct installed thru the basement and angled properly exiting the building.
Oakwood - Nashua, NH 03060
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