Boiler Replacement in Southern NH
Replace a failing boiler with a high-efficiency system, installed in as little as a day. NHSaves rebate help, 0% financing available, and a free written estimate.
Expert Boiler Replacement in Southern NH
When a boiler reaches the end of its life, proper replacement means more than just swapping out equipment. It means correct sizing, proper venting, and making sure the new system works with your existing radiators or baseboard. A.J. LeBlanc Heating has handled thousands of boiler replacements across Southern NH.
A Trusted Southern NH Choice, Family-Owned Since 1928
All Major Boiler Brands
We install Navien, Weil-McLain, Burnham, Viessmann, Buderus, Rinnai, Energy Kinetics System 2000, Saint Roch, and other current boiler lines. We match the brand and model to the home's heating needs, fuel, distribution system, venting, and available space.
NHSaves Rebates Available
High-efficiency boiler replacements may qualify for NHSaves rebates. As a registered NHSaves contractor, we apply qualifying point-of-sale rebates and help you complete the application for other available programs, which you sign and submit.
Proper System Sizing
We size the replacement from the home's heating needs, existing radiation and zoning, construction, venting, and equipment performance. A detailed load calculation is completed when the project requires one, including every new-construction heating and cooling system.
Licensed Fuel Gas Fitters & Certified Oil-Burner Technicians
Natural-gas and propane boiler work is performed by New Hampshire-licensed fuel gas fitters. Our technicians are also factory-trained and certified on Carlin, Beckett, and Riello oil burners. We pull permits, coordinate inspections, and complete the work to code.
Gas and Propane Boiler Replacement
High-efficiency condensing boilers from Navien, Viessmann, Rinnai, and others offer significant efficiency improvements over older cast iron systems. We handle the full replacement including venting changes for condensing systems.
- Navien, Viessmann, Rinnai, Weil-McLain, and more
- High-efficiency condensing models available
- All venting and gas line work included
- Permits and inspections handled
- NHSaves rebates on qualifying systems
Oil Boiler Replacement
We replace oil-fired boilers with new high-efficiency oil equipment or help you convert to gas or a heat pump system if that makes sense for your home.
Our technicians are factory-trained and certified on Carlin, Beckett, and Riello oil burners. We match the burner to the equipment and set up combustion for safe, proper operation within the manufacturer's specifications.
- All major oil boiler brands
- Efficiency upgrades available
- Oil to gas conversion if desired
- Heat pump hybrid systems as an option
- Free estimate with all options presented clearly
How We Price Boiler Replacement
Free Written Estimates
A Home Comfort Advisor comes to your home, looks at the existing system, your venting, and your fuel setup, and gives you a written quote. There is no charge for the visit and no obligation to buy.
All-In Project Pricing
One number covers the equipment, the installation labor, the venting and gas-line work, the permits, and the inspection. No mid-job surprise charges.
NHSaves Rebate Help
A.J. LeBlanc Heating is a registered NHSaves contractor. We apply qualifying point-of-sale rebates and help you complete the application for other available programs, which you sign and submit.
No Pressure, No Upsell
We recommend the right-size boiler for your home, not the most expensive one we can sell. No pressure sales, ever.
0% Financing Available
Spread the cost with 0% promotional financing on qualifying installations. Ask your Home Comfort Advisor about current offers, eligibility, and available terms.
Reviews From Southern NH Homeowners
So far the heat pump is working great this winter, only spent about $50 extra in electricity to heat the house for the month of November, much cheaper than propane.
Ginger FraserHeat Pump customerI expected that a company with a lot of trucks would cost more than a one or two person shop. I was wrong. A.J. LeBlanc Heating had the products I was interested in and at the best price. From the initial call to the completed installation of a new boiler and oil tank, I was impressed with the professional communications and customer service. The installation team was great and you could tell they knew what they were doing and took pride in their work. They were here each day early and happy to answer all my questions and teach me a few things too. I could go on but overall I was very satisfied with the experience and the work they did. Would definitely recommend.
Gary LeverBoiler Installation customerLeBlanc HVAC did a great job installing our large/complex mini-split ductless heat pump system. The technicians were very skilled and committed to doing a great job. Very happy with the results.
Roger DugasHeat Pump customerRead more reviews on our testimonials page.
Free Estimate - No Pressure
Call or fill out the form. We will schedule an in-home assessment, present your options clearly, and provide a written estimate.
Frequently Asked Questions
When should I replace my boiler?
Boilers typically last 20 to 30 years. Signs it is time to replace include frequent repairs, rising fuel bills, uneven heating, or a system over 25 years old. We can assess your system and give you an honest recommendation.
What is the most efficient boiler available?
Many current residential condensing gas boilers from Navien, Viessmann, Rinnai, and Weil-McLain are rated around 95 percent AFUE, depending on the model. Actual performance also depends on correct sizing, controls, water temperatures, venting, and installation. We compare current models, warranty coverage, installed cost, and available rebates before recommending a boiler.
How long does boiler replacement take?
Most boiler replacements are completed in one to two days. We confirm the timeline before scheduling.
Are there rebates for boiler replacement in NH?
NHSaves offers rebates on high-efficiency boiler replacements. Rebate amounts depend on the system and your fuel type. As a registered NHSaves contractor, A.J. LeBlanc Heating reviews the rebates that may apply, applies eligible point-of-sale rebates, and helps with other program applications. We review the current program requirements with you before the work begins.
Get in Touch
Fill out the form and we'll get back to you. Usually the same business day. For emergencies, call us directly.
Contact Information
Mon-Fri: 8am-4:30pm
Evenings & Weekends: Emergency Service
24/7 Emergency Service
No heat? No hot water? Call 603-623-0412 any time.