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Derry NH

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Plumbing, Heating and Air Service in Derry

When your home’s cooliing, heating, or plumbing system isn’t working right, you need a team you can trust to fix it fast near Derry, NH. Whether it’s a broken air conditioner in the middle of summer, a heating system that won’t start, or a plumbing leak that won’t quit, our skilled HVAC technicians and plumbers are ready to help. We provide reliable, high-quality service to keep your home comfortable all year long.

Don’t let small issues turn into expensive repairs—give us a call at 603-424-8258 or contact us online anytime, day or night. Whether you need routine HVAC maintenance, a system upgrade, or emergency plumber repairs, we’re here when you need us.

Local Furnace, Boiler and Cooling Services

New England weather can be unpredictable, but your home’s heating and cooling system should be dependable. Our expert team ensures your system is running smoothly, no matter the season.

Heating Services

Winters in New Hampshire can be brutal, so a reliable heating system is essential. We offer:

Air Conditioning Services

Summers can get hot and humid, but we’ll keep your home cool with:


Plumber Services in Derry

From leaky faucets to major pipe repairs, our licensed plumbers handle it all.

Plumbing Repairs & Installations

We fix and install:

Drain & Sewer Services

Got a clogged drain? We can help with:

Get the Best HVAC & Plumbing Services

Did your heating or cooling system suddenly stop working? Burst pipe in the middle of the night? We know emergencies don’t wait for business hours, which is why we offer 24/7 emergency repairs for plumbing, heating and air conditioning problems.

Call 603-424-8258 for expert HVAC and plumber service in Derry, or reach out online with any questions.

See What Your Neighbors Are Saying

Check out reviews below from local homeowners who trust us for their HVAC and plumbing needs!

Recent Jobs and Reviews in Derry, NH

Rated 5.0 out of 5 stars based on 1 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
I removed the old burner tubes and replaced them with new ones. After assembling it all back together, I used soapy bubble as a gas detector and found no leaks. I checked the incoming manifold pressure and it was 12 inches water column. I checked outgoing gas pressure and it was 10 inches water column on high fire and low fire was 4.8 inches water column. I cycled the unit five times to make sure everything operated correctly. Lastly, I checked the combustion for the high and the low fire. I added the combustion data with pictures to the job. I went over and I double checked all the joints that I loosened with soapy bubbles and once again found no leaks. Mark came in the beginning and replaced the expansion tank on the water heater.
Derry, NH 03038
Review
Great service!
Dragan - Derry, NH 03038
Jack D.
Jack D. Checked in
Adjusted the low and high fire operation. I also adjusted the blower speed to produce a more comfortable temperature rise. Thank you!
Derry, NH 03038
Jack D.
Jack D. Checked in
Everything went great with your Lennox propane furnace maintenance. I would recommend replacing the burners as they are pretty corroded and I noticed when the furnace flame lit off it was a rough start. We also noticed that the expansion tank on the water heater is failed.
Derry, NH 03038
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