Founded in 1987 by Mark Downing, Granite State Mechanical Services has provided professional installation and service of heating, cooling, and plumbing products for New Hampshire's homeowners and businesses for over 30 years. Throughout the course of 3 decades, we've learned a lot and still to this day continue to innovate to always make sure we are arriving to a customer's homeas the Service Specialists. As we look to the future we are excited to have Mark's son Zak, a fresh graduate from The University of New Hampshire, join the family business.

Preventative maintenance is the most important step you can take to protecting the investment you've made on your heating system. With annual maintenance visits from the Service Specialists, you can expect to: maintain the efficiency of your system, prevent breakdowns from occurring, gain comfort knowing your system is safe, and save money on energy and repair costs. Preventative maintenance (also known as a tune-up) for your heating system is just like having your car inspected every year. Your car mechanic runs tests on your vehicle to make sure everything is running properly, that your vehicle is safe to operate, and that the engine has no defects or issues.

Your heating system is a complex machine that provides your home with the comfort and warmth you need. Sometimes your furnace may be acting odd, making weird noises, or not operating properly. You could be in the search to cut back on energy costs too. Or maybe you're looking to have preventative maintenance performed. No matter your situation, you do not want just anyone working on the complicated boiler system in your basement. You need to find a trustworthy company that can help you determine the big question: "Repair or Replace my heating system?".

Are you experiencing the dreaded ice cold morning shower? Maybe it's time to renovate your bathroom and add an update with new fixtures or complete a total makeover. Whether you have a repair or you are looking at installing a new plumbing product, it can be a challenge finding a plumber to trust. You have your options when it comes to choosing a local plumber contractor to work on your NH home. The old saying proves to be true; you get what you pay for. Make sure to consider some criteria points to help find your NH home the perfect plumbing contractor for all your plumbing needs.

Say goodbye to the days of turning on the hot water at your shower or faucet and discovering there is none (how irritating). Tankless hot water heaters are tankless, meaning they have no container that is holding a pre-heated set amount of water. Instead of having that pre-heated water, a tankless unit senses when you turn a faucet or appliance on and immediately starts making hot water. A tankless hot water heater not only provides an endless supply of hot water; you never have to worry about running out of hot water.

Your home is your haven. So when you notice an issue with your heating system, we understand how that feels. When your furnace won't turn on or you hear strange noises coming from your boiler, we're here to help. From simple repairs and maintenance to complex custom designed systems, our team of licensed and trained Service Specialists are standing by. You have your options when it comes to choosing a heating contractor to work on your NH system. The old saying proves to be true; you get what you pay for.

When your home's heating system is struggling to provide you with heat, the last thing you want to deal with is calling a heating HVAC service repair contractor. All you want is to get your system heating again, especially when it's freezing outside. Why does it have to be such a pain? And why does it seem that heating problems always arise when it's freezing outside? A call to the Service Specialists will have all your heating problems fixed and questions answered. Choose our family owned business to provide you and your home with the heating solutions you need to get warm and comfy again while also preventing future repairs from occurring.

Jumping into a freezing cold shower is torturous. Worse than that is discovering your tank water heater has reached the end of its life or is in need of service & repair. Our team of Service Specialists are standing by, ready to assist you with your hot water heating needs. Whether it's time to replace or a repair is needed, we're here to help. In New Hampshire, the average tank style water heater lasts anywhere from 7-10 years. Unfortunately, if you have poor water conditions you can see even less life out of your tank.

When it comes to your forced air heating system, known as a furnace, you want to ensure you have a local heating contractor who has the experience and knowledge about these systems. There are important factors when it comes to designing a furnace heating system, especially with airflow. At GSMS, our team of specialists are here to help with your new furnace. We have decades of experience and continue to learn about new technologies, allowing us to truly be your local NH furnace experts. Learn more about our family business and how we have been proudly serving our New Hampshire neighbors for over 30+ years.

Forget about needing ductwork in order to have comfortable indoor air, no matter the season. Window units are a pain to take in and out (are ugly) and are electricity hogs. Central air is okay if you already have ductwork, but it can be in-efficient and leave you cooling / heating your entire house when you really only need to cool/heat the room you're in. Enter ductless mini-split! Our mini-split systems are heat pumps, meaning they can cool AND heat your home. Our standard models can provide you with supplemental heat.

On time service.e fficient.knowledgeab le.and reasonable rates. Would recommend highly.

Exceptional, qualified, professional services for all your mechanical needs! GSMS is the best!

GSMS was so helpful in dealing with our frozen pipe! Thank you again for helping us get our heat back in the freezing weather this week! Highly recommend!

What's new?

We've spotted a GSMS truck out in the wild this morning. Drive safe! gsmsnh.com

Posted on Feb 09, 2021  •  Facebook

Out with the archaic old and in with the wicked efficient new! This homeowner received a $1,800 rebate back too! gsmsnh.com

Posted on Jan 25, 2021  •  Facebook

What a year. thank you to our existing customers for your continued trust working in your homes. To our new customers, welcome to the GSMS family. Happy New Year!

Posted on Dec 31, 2020  •  Facebook

Here's to a Very Merry Christmas from our family to yours!

Posted on Dec 25, 2020  •  Facebook

Getting in the Christmas spirit. Stay Warm!

Posted on Dec 16, 2020  •  Facebook

Thinking about those mini-splits? Much more efficient than a window unit AND they pay you back with rebates up to $… https://t.co/55I0wqkx7Y

Posted on Apr 23, 2019  •  Twitter

Come say hi! 👋 We’re having a great time spreading the word about offering our services to the Seacoast. Booth 130… https://t.co/J5VjcIfbpx

Posted on Apr 06, 2019  •  Twitter

Thinking about projects for the house? This is the show to get some great ideas & meet some awesome contractors...… https://t.co/N9hY0LqmSj

Posted on Apr 01, 2019  •  Twitter

Only allow a licensed plumber to make repairs to your water heater. Not trying to create fear, but DIY repairs such… https://t.co/IPHUprWLLC

Posted on Feb 18, 2019  •  Twitter

Clogged showerhead? L👀K at these quick cleaning methods you can try yourself! It worked wonders on my showerhead! I… https://t.co/uOChdPwV4R

Posted on Feb 12, 2019  •  Twitter

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