Heating System
Installation & Repair
Furnaces, boilers, heat pumps & water heaters installed and serviced by licensed and certified heating technicians. Free estimates. 24/7 emergency response.
Heating Repair, Installation & Replacement
in Southern New Hampshire
Our team installs and services furnaces, boilers, heat pumps, and water heaters throughout Southern NH. EPA Section 608-certified technicians handle refrigerant systems. New Hampshire-licensed fuel gas fitters handle natural-gas and propane equipment. Licensed plumbers complete water-heater work when plumbing is involved, and our oil-burner technicians are factory-trained and certified on Carlin, Beckett, and Riello.
Furnace Repair & Installation
Gas, oil, and propane furnaces installed and serviced across Southern NH. We help you choose the right system and get it running right.
Furnace ServicesBoiler Repair & Installation
Oil, gas, and high-efficiency wall-hung condensing boilers. We design, install, and service complete hydronic heating systems.
Boiler ServicesHeat Pump Installation
Cold-climate heat pumps provide heating and cooling from one system. Select models can provide heat at -13°F or below, depending on the equipment, and qualifying systems may be eligible for current NHSaves incentives.
Heat Pump ServicesWater Heater Installation
Traditional, tankless, and hybrid heat pump water heaters installed and serviced. Same-day replacement when available.
Water Heater Services
Furnace Installation & Replacement
When it is time to replace or upgrade a furnace, an A.J. LeBlanc Heating Home Comfort Advisor helps you compare the options. Our HVAC team installs gas, oil, and propane systems, with New Hampshire-licensed fuel gas fitters handling natural-gas and propane equipment. Furnace replacement starts at around $3,875 installed, including equipment, labor, electrical work, permits, and our five-year heating and air-conditioning workmanship warranty.
- Gas Furnace Installation
- Oil Furnace Replacement
- Propane Furnace Installation
- High-Efficiency Furnace Upgrades
- Annual Furnace Maintenance
- Emergency Furnace Repair
Boiler Installation & Service
From cast-iron oil boilers to high-efficiency wall-hung condensing boilers, we design and install complete hydronic systems with proper zoning, piping, and controls. We also build hybrid hydro-air systems that pair a boiler with an air handler, and optionally a heat pump, to deliver forced-air heating and cooling from a single duct system.
- Gas Boiler Installation
- Oil Boiler Replacement
- Wall-Hung Condensing Boiler
- Combi Boiler (Heat + Hot Water)
- Hydronic Zoning Systems
- Hybrid Hydro-Air with Heat Pump
- Annual Boiler Service
Cold-Climate Heat Pumps for NH Winters
Select cold-climate heat pumps can provide heat at -13°F or below and cool the home in summer. They can replace or supplement a furnace or boiler when the system is sized for the home. In oil- and propane-heated homes, using a heat pump can reduce fuel use. Actual savings depend on energy prices, the building, system selection, and operation.
- Ducted and Ductless (Mini Split) Heat Pumps
- Cold-Climate Models Rated to -13°F
- Add to an Existing Furnace or Boiler, or Whole-Home
- NHSaves Rebates on Qualifying Heat Pumps
- Free Written Estimate with Real Fuel-Cost Numbers
Water Heater Installation & Repair
Tank, tankless, and hybrid heat pump water heaters installed and serviced. We restore reliable hot water and help you upgrade to more efficient equipment.
- Traditional Tank Water Heaters
- Tankless On-Demand Water Heaters
- Hybrid Heat Pump Water Heaters
- Indirect Water Heaters
- Same-Day Installation When Available
- Heat Pump Water Heaters: NHSaves $750 rebate available
How It Works
Free Estimate
We review your home, current equipment, and comfort goals. No pressure, no commission-based upsells.
Clear Written Quote
Our written quote covers equipment, all labor, electrical work, permits, and our five-year heating and air-conditioning workmanship warranty. No surprise line items when the job is done.
Install & Verify
We complete a clean installation, test the system, and walk you through the controls. Required permits and inspections are included, and the heating and air-conditioning installation is backed by our five-year workmanship warranty.
Heating System Installations
Financing & Rebates
We offer financing with approved credit and review current New Hampshire utility rebates with you before you choose equipment.
- 0% financing available with approved credit
- NHSaves rebates for qualifying systems
- New England Heat Pump Accelerator ($650/unit on qualifying cold-climate heat pumps)
- Utility rebates for high-efficiency equipment
Brands We Install & Service
BoschPlatinum Dealer
Bosch offers IDS ducted heat pumps, mini splits, furnaces, and boilers. As a Bosch Platinum Dealer, A.J. LeBlanc Heating matches the equipment to the home and explains model-specific performance and warranty coverage before installation.
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Goodman
Goodman offers gas furnaces, central air conditioners, heat pumps, and air handlers across a range of efficiency levels. A.J. LeBlanc Heating installs and services Goodman equipment throughout Southern NH.
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Amana
Amana offers gas furnaces, central air conditioners, and heat pumps. Select registered models include limited lifetime coverage, and A.J. LeBlanc Heating explains the exact model, registration requirements, and warranty terms in the proposal.
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Rheem
Rheem offers furnaces, air conditioners, heat pumps, and several types of water heaters. A.J. LeBlanc Heating selects and services the equipment by application, not simply because the products share a brand name.
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York
York offers air conditioners, heat pumps, furnaces, and air handlers for ducted home-comfort systems. A.J. LeBlanc Heating installs and services York equipment throughout Southern NH.
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American Standard
American Standard offers furnaces, heat pumps, air conditioners, and air handlers across several efficiency and comfort levels. A.J. LeBlanc Heating installs and services the brand throughout Southern NH.
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Trane
Trane offers furnaces, heat pumps, air conditioners, and air handlers for ducted heating and cooling systems. A.J. LeBlanc Heating installs, maintains, and repairs Trane equipment throughout Southern NH.
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Thermo Pride
Thermo Pride builds oil furnaces for ducted heating systems. A.J. LeBlanc Heating installs and services Thermo Pride equipment, with technicians trained and certified on Carlin, Beckett, and Riello oil burners.
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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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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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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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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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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.
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Biasi
Biasi B-10 triple-pass oil boilers remain in many Southern NH homes. A.J. LeBlanc Heating services and repairs existing Biasi systems but does not feature Biasi for new boiler sales.
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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.
Learn moreHeating System FAQ
What does furnace installation cost in Southern NH?
Furnace replacement in Southern NH starts around $3,875 installed. That covers the equipment, all labor, electrical work, permits, and our five-year heating and air-conditioning workmanship warranty. High-efficiency or variable-speed units typically run $5,200 to $8,100+ installed. We give you a clear written quote with everything included before any work begins.
How long does furnace installation take?
Most furnace replacements take 4-6 hours. Ductwork modifications may take longer. We'll give you a clear timeline before any work begins.
Do you offer emergency heating service?
Yes. Emergency heating service is available 24/7 throughout our service area. Call 603-623-0412 any time.
Should I repair or replace my heating system?
Repair or replacement depends on the failed part, the system's condition, repair history, safety, warranty coverage, and the cost of both options. We inspect the equipment, explain what we found, and give you the repair and replacement choices that make sense for the home. Our techs are not commission-based, so you always get an honest answer either way.
Can a heat pump replace my furnace or boiler in NH?
Yes. Select cold-climate heat pumps can provide heat at -13°F or below, depending on the model. In many Southern NH homes, a properly sized heat pump can serve as the primary heating system. Some homeowners keep the existing furnace or boiler as backup for the coldest stretches. We size the system to your home and walk you through the fuel-cost numbers before you decide.
Are there rebates for new heating systems in NH?
Yes. NHSaves utility rebates and the New England Heat Pump Accelerator offer rebates for qualifying heat pumps and high-efficiency systems. We'll help you identify what's available.
How often should a heating system be serviced?
Service frequency follows the equipment and manufacturer schedule. Regular maintenance can help protect performance, document the system's condition, and identify developing problems before the heating season.
Southern NH Communities We Serve
Free estimates and prompt service across Southern New Hampshire. Find your town for local details, or call 603-623-0412.
Services in Southern NH's Largest Cities
What Customers Say About Our Heating Service
"They came in with the best price for a new furnace. Friendly, quick, and will only use them to service our furnace from now on."
"I recently had a new furnace installed and from the estimate provided by Rich to the installation performed by David and Shawn, everything was top notch."
"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."
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.