Ready to Replace Your Old Boiler? New Hampshire’s Trusted Experts for Boiler Replacement and Energy-Efficient Heating
A forced water heating system, also known as a boiler, is a very common heating system that is installed throughout New Hampshire homes. These systems comprise the boiler itself (either gas or oil) and are connected to baseboard radiators or radiant floors to provide you with heat. A boiler is a very complex system and requires a professional with experience to be properly maintained and installed. If one part of the boiler installation is not completed properly, you can have never-ending problems.
At GSMS, our team of HVAC specialists is 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.
When it's time to upgrade your home's heating system, GSMS is here to help! Call 603-424-8258 to get started.
Boiler FAQs
We recommend a tune-up once per year, ideally before the heating season begins. Regular maintenance helps improve efficiency, prevent breakdowns, and keep your manufacturer's warranty valid.
Installing a new boiler costs between $4,500 and $8,000, covering both the unit and labor in and around Manchester, NH. Your final price will depend on key details like the type of boiler you choose, its energy efficiency, and how complex the installation is.
If your boiler is over 15 years old, requires frequent repairs, or causes uneven heating, it’s often more cost-effective to replace it. GSMS can inspect your system and recommend the best high-efficiency replacement for your New Hampshire home.
GSMS handles every step — from system sizing and removal of your old unit to new boiler setup, venting, and performance testing. We ensure your new system runs safely and efficiently before completion.
Yes. Our technicians service and repair all major brands and models, including Energy Kinetics, Lennox, Weil-McLain, and more.
Yes — we specialize in safe and efficient boiler conversions to natural gas, helping homeowners reduce energy costs and environmental impact.
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 needs 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 have a 10-20-year lifespan. Of course, many factors can address this. If yours is getting older, start putting a plan together for replacement rather than dealing with an emergency.
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. We also offer comprehensive boiler heating maintenance plans for lasting protection against breakdowns.
Boiler Repair Services in New Hampshire
Even a small boiler issue can lead to higher fuel bills, uneven heating, or complete system failure if left untreated. GSMS provides fast, reliable boiler repair across Manchester and southern New Hampshire, handling everything from minor leaks to full system malfunctions.
Our boiler repair services include:
- Diagnostic testing for ignition issues, leaks, and pressure loss
- Circulator pump, valve, and thermostat replacements
- Flue and vent inspections for safety and airflow
- Expansion tank and relief valve checks
- Electrical component and control board repairs
- Emergency heating service during cold-weather outages
Our licensed HVAC service specialists work on all major boiler brands and models, including high-efficiency condensing and Energy Kinetics systems. We arrive prepared with parts, tools, and local expertise to get your heat back on quickly and safely.
Boiler Installation & Replacement
When it’s time to replace your old boiler, GSMS provides expert installation of modern, energy-efficient systems built for New Hampshire homes. We’re certified installers for Energy Kinetics System 2000 boilers to maximize comfort while reducing energy costs.
Our installation process includes:
- Full home heating assessment and system sizing
- Old boiler removal and eco-friendly disposal
- Installation of a new boiler and connection of water/gas lines
- The setup of controls, zoning, and thermostats
- Efficiency and safety testing before system handoff
- Walkthrough of system operation and maintenance tips
Whether you’re upgrading to a condensing boiler or switching from oil to gas, our team ensures your new system is installed with precision and care.
Boiler Maintenance
Regular maintenance is key to keeping your boiler running efficiently and extending its lifespan. Our experienced technicians perform a full maintenance service — not just a checkup — ensuring every part of your system operates safely and efficiently before winter.
A GSMS boiler maintenance includes:
- Complete cleaning of burners, heat exchangers, and flue passages
- Safety inspection of gas lines, valves, and venting
- Pressure and temperature control testing
- System efficiency check and performance adjustments
- Water treatment or sediment inspection (when applicable)
- Recommendations for repairs or component upgrades
GSMS takes a thorough approach to every boiler service. We perform complete maintenance that ensures your system operates safely and efficiently — so your home stays warm when it matters most.
Why Choose GSMS for Boiler Installation?
- Tailored Boiler Heating Solutions: At GSMS, we understand that every home is unique. We work closely with you to design and install a boiler system that meets your specific heating needs and budget. Our customized solutions ensure that your home stays warm and comfortable throughout the cold months.
- High-Quality Boilers and Equipment: We install only the highest-quality boilers from leading manufacturers. Our commitment to using top-notch equipment guarantees that you receive a reliable, efficient, and long-lasting heating system that will serve your home for years to come.
- Energy Efficiency Focus: Our boiler installations prioritize energy efficiency to help you save on heating costs and reduce your environmental impact. We offer the latest energy-efficient models and ensure proper installation to maximize performance and efficiency.
- Family-Owned, Customer-Centered: As a family-owned business, we place a high value on customer satisfaction and treat every home as if it were our own. Our friendly and professional team is dedicated to providing exceptional service from the initial consultation to the final installation and beyond.
Upgrade Your NH Home with a New Boiler Today
Experience the comfort and reliability that comes with a professionally installed, high-efficiency boiler from GSMS — your trusted New Hampshire heating experts. Whether you’re replacing an aging system or upgrading for better efficiency, our licensed team ensures every installation is done right the first time.
Call 603-424-8258 or contact us online to schedule your boiler installation or replacement today and enjoy dependable, energy-saving heat all winter long.
