Boiler Installation &
Replacement in Southern NH
Gas, oil, and propane boiler installation and replacement by licensed NH technicians. High-efficiency condensing boilers, hydronic systems, and radiant heat throughout Southern NH.
Gas & Propane Boiler Installation
A high-efficiency condensing boiler can dramatically reduce your heating costs compared to an older standard-efficiency unit. We install the leading gas, propane, and oil boiler brands throughout Southern NH, each one properly sized for your home's heat load and zone layout. Navien and Rinnai combi-boilers handle both heating and domestic hot water in a single compact unit, freeing up basement space and removing the need for a separate water heater.
- Gas and propane boiler installation and replacement
- High-efficiency condensing boilers 90+ AFUE
- Hydronic zone systems and radiant heat
- Navien and Rinnai combi-boilers (heat and hot water in one)
- All permits pulled and inspections handled
- NHSaves rebates available
Oil Boiler Installation & Replacement
Many Southern NH homes heat with oil boilers, and when it's time for a replacement we make the process straightforward. We install high-efficiency oil boilers and can also discuss conversion options if you're considering switching to gas or adding a heat pump to reduce oil consumption. Our technicians are factory-trained and certified on all three major oil burners, Carlin, Beckett, and Riello, so we can match the right burner to your equipment and fine-tune it for optimal efficiency.
- Oil boiler installation and replacement
- System flushing and zone valve replacement
- Oil-to-gas conversion planning and installation
- Heat pump hybrid systems to reduce oil use
- 24/7 emergency boiler repair
Boiler Installations
Boiler Brands We Install & Service
Saint Roch
Saint Roch offers cast-iron, triple-pass boilers that can be configured for oil or gas burners. A.J. LeBlanc Heating evaluates the home and existing system before recommending one for replacement.
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Energy Kinetics
Energy Kinetics System 2000 combines space heating with an indirect hot-water tank in oil, natural-gas, and propane configurations. A.J. LeBlanc Heating sizes, installs, and services the complete system.
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Navien
Navien offers wall-hung condensing boilers, combi-boilers, and tankless water heaters. A.J. LeBlanc Heating sizes, installs, maintains, and repairs Navien equipment throughout Southern NH.
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Rinnai
Rinnai offers tankless water heaters and condensing boilers. A correctly sized tankless unit can provide continuous hot water within its rated flow while using less floor space than a storage tank.
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Weil-McLain
Weil-McLain offers cast-iron and condensing boilers in gas, propane, and oil configurations. A.J. LeBlanc Heating installs and services the brand for hot-water and steam heating systems.
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Viessmann
Viessmann offers condensing gas boilers and related hydronic equipment. A.J. LeBlanc Heating installs and services Viessmann systems and sizes the equipment for the home's zones and design load.
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Buderus
Buderus cast-iron boilers remain common in New Hampshire hydronic systems. A.J. LeBlanc Heating installs and services Buderus equipment and evaluates the boiler, burner, controls, and connected zones together.
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Burnham
Burnham offers oil and gas boilers in cast-iron and condensing designs for hot-water and steam applications. A.J. LeBlanc Heating installs and services Burnham equipment throughout Southern NH.
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Utica
Utica offers gas and oil boilers for hot-water and steam heating systems. A.J. LeBlanc Heating installs, maintains, and repairs Utica equipment throughout Southern NH.
Learn moreBoiler FAQ
How much does boiler installation cost in NH?
A boiler replacement in Southern NH typically runs $8,500 to $15,000 installed depending on fuel type, efficiency rating, and whether any piping or zone valve work is needed. We provide free written estimates with all costs included upfront.
How long does boiler installation take?
Most boiler replacements take one to two days. We remove the old unit, install the new boiler, flush the system, test all zones and safety controls, and verify proper operation before we leave.
What is a condensing boiler?
A condensing boiler extracts additional heat from exhaust gases that a standard boiler would vent away, making it 90 to 95 percent efficient versus 80 to 85 percent for standard models. For most NH homes replacing an old boiler, the upgrade can pay for itself over time in fuel savings.
What brands do you install?
We install Saint Roch, Energy Kinetics, Navien, Rinnai, Weil-McLain, Viessmann, Buderus, Burnham, Utica, Trio, and others. For gas boilers, Navien combi-boilers are a popular choice since they handle both heat and domestic hot water in one compact unit.
Do you offer emergency boiler repair?
Yes. We provide 24/7 emergency boiler repair. Call 603-623-0412 any time.
Get a Free Boiler Estimate
We assess your home, recommend the right system, identify all available rebates, and give you a written quote upfront. No pressure.
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.