We take your system replacement to another level. Craftsmanship comes standard.

Your Local Boiler Heating System Installation & Replacement Contractor.

A forced water heating system, also known as a boiler, is a very common heating system that is installed throughout NH homes. These systems comprise of the boiler itself (either gas or oil) and connected to baseboard radiators or radiant floor to provide you with heat. A boiler is a very complex system and requires a professional with experience to properly maintain and install. If one part of the boiler installation is not completed properly, you can have never ending problems.

At GSMS, our team of specialists are here to help with your new boiler. We have decades of experience and continue to learn about new technologies, allowing us to truly be your local NH boiler experts. Learn more about our family business and how we have been proudly serving our New Hampshire neighbors for over 35+ years.

Schedule a Free Project Design Visit!

We offer a unique site visit that’s not about selling you equipment:

System Design Customized For Your Home

Absolutely No Sales Pressure

Solutions to Fit Almost Any Budget

Common Signs your Boiler is Failing

  • Cost & Number of Repairs

    Consumer Reports states that when your repair costs more than 50% of the cost of a new unit, then it is time to seriously consider a new unit. Also, when a system starts to age and need repairs, you can expect additional repairs to come (just like repairing your car).

  • Energy Usage

    A new system comes with newer technology to help increase efficiency. New units have the ability to increase your comfort while decreasing fuel costs! Some of our systems go up to 98% efficiency… meaning for every $1 spent on fuel, 98-cents is being used to heat.

  • Comfort Factor

    A new system not only increases your actual comfort level in your home, but it also increases your mental comfort with a new warranty to give you years of worry-free heating!

  • System Age

    Most boiler systems should see a lifespan of 10-20 years. Of course many factors can address this. If your’s is getting older, start putting a plan together for replacement rather than dealing with an emergency.

  • Peace of Mind

    With a new system, comes a new warranty. That gives you many years ahead without having to think about expensive repairs and being left without heat.

a promise you can trust, that’s us.

Our worry free promise that every project we complete will come with an upfront & honest price, a team of Installation Specialists who are trained & certified, a commitment to providing the most advanced products & services possible, and that all our work we complete will last. It’s part of our mission to redefine home service.

Common NH Heating System Questions

  • There are a few things you as a homeowner can safely check before you make the call to a Service Specialist.

    If your system has one, make sure to check the Emergency Shut-Off switch didn’t get flicked by accident. This switch is usually located right next to your heating system or in your staircase walking down to your basement.

    Batteries! Check your thermostat has fresh batteries in it… this truly can be a culprit sometimes.

    Ensure you have fuel to feed your system.

    If those are all verified and you’re still having an issue, it’s best to reach out to your team of Service Specialists to perform a complete diagnosis.

  • Here in New Hampshire, we have many methods of heating our homes and businesses.

    First, you either have a gas (propane or natural gas) system or a oil system. This is the type of fuel you purchase to heat.

    The second part is you either have a forced air or forced water system. A forced water system, also known as a boiler, uses radiators/baseboards/radiant floor to heat your spaces. A forced air system, also known as a furnace, uses ductwork to blow air into each room.

    Our Service Specialists are certified & trained to work on all types of heating systems!