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

Your Local Furnace Heating System Installation & Replacement Contractor.

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… you want make sure your furnace installation or replacement is completed properly.

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 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 Furnace 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 heating systems should see a lifespan of 15-20 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!