A.J. LeBlanc Heating: A Legacy of Family Mechanical Expertise
A.J. LeBlanc Heating has served southern New Hampshire families since 1928. What started as a single mechanical contractor is now a fourth-generation family business covering plumbing, heating, cooling, electrical, and generator work across Manchester, Bedford, Concord, Nashua, Salem, Auburn, and the surrounding communities. Nearly a century of NH heating seasons has given us the experience to handle whatever your home needs.
Here is a look at the family business behind the trucks and the people who keep it running.
Four generations, one mission
The company was founded in 1928, when heating a New Hampshire home meant coal stoves, cast-iron boilers, and the early years of oil-fired furnaces. Each generation since has carried the same commitment forward through a fundamentally changing industry:
- The shift from coal to oil heat in the mid-twentieth century
- The rise of forced-air gas furnaces in postwar homes
- The introduction and refinement of central air conditioning
- Modern condensing boilers and furnaces
- Cold-climate heat pumps
- Smart thermostats and home automation
- Electrification, EV chargers, and indoor air quality
The technology has changed dramatically. The principles have not: skilled work, honest pricing, and reliability when customers need us.
A full-service mechanical contractor
Most NH HVAC contractors specialize in one or two trades. We have built the company to cover the full residential mechanical scope under one roof:
- Plumbing (licensed plumbers handling water heaters, fixtures, drains, leak detection)
- Heating (boilers, furnaces, heat pumps, dual-fuel)
- Cooling (central AC, ductless mini splits, heat pumps)
- Electrical (panel upgrades, EV chargers, surge protection)
- Generators (standby and portable installation, service)
For homeowners, this means one phone number for the whole house. For projects that touch multiple trades (a heat pump install involving electrical work, a water heater replacement involving gas piping), the entire job stays in-house with one company accountable for the outcome.
What family business actually means
"Family business" is a phrase a lot of companies use. For us, it has practical implications:
Continuity
The owners are accessible. Decisions about how we do work, how we treat customers, and how we train technicians get made by people whose names are on the door and whose reputation in the community is at stake every day.
Training and knowledge transfer
Our technicians learn the trade alongside experienced installers and plumbers. Skills, procedures, and the institutional memory of decades of NH-specific work get passed down. We integrate new regulations, new technologies, and new manufacturer standards through formal training and on-the-job mentorship.
Long-term thinking
A family business that has been around for nearly a century thinks differently about customer relationships than a private-equity-rollup chain. We expect to be called by your kids when their water heater fails. We make decisions that hold up to that horizon.
Community investment
We sponsor local events, support community organizations, and participate in NH industry groups. The community that has supported us for almost a hundred years is the community we live in.
Industry recognition
A.J. LeBlanc Heating has been honored across multiple categories in:
- Union Leader Readers' Choice (2026): Best HVAC Contractor, Best Plumbing Company, Best Electrical Contractor, and Best Generator Company
- Manchester Radio Group's Best of The 603 (2025): Best Company to Work For, Best Customer Service, Best HVAC, Best Heating and Cooling, Best Plumber, and Best Electrician
These are community-voted recognitions rather than industry-panel awards, which makes them direct reflections of customer experience.
Manufacturer certifications
We are a Mitsubishi Diamond Dealer and a Bosch Platinum Dealer, among other manufacturer certifications. Diamond and Platinum status reflect ongoing factory training, install volume, and customer satisfaction metrics. The full list of brands we install is on our manufacturers page.
Looking ahead
The next generation of LeBlancs is already part of the business. The technologies they will work with in the coming decades (heat pump water heaters, all-electric homes, EV infrastructure, smart grid integration, low-GWP refrigerants) will look as different from today as today's high-efficiency condensing boilers look from the cast-iron boilers of 1928. The work itself will not change. Take care of the customer. Do the job right. Stand behind it.
Schedule service or a consultation
If you have a NH home that needs any plumbing, heating, cooling, electrical, or generator work, contact A.J. LeBlanc Heating. For 24/7 emergency service, call 603-623-0412. Serving New Hampshire families since 1928.
Frequently Asked Questions
How long has A.J. LeBlanc Heating been in business?
Since 1928. We are now a fourth-generation family business.
What trades do you cover?
Plumbing, heating, cooling, electrical, and generators. Plus EV charger installation, smart thermostat installation, and indoor air quality solutions.
Are you actually still family-owned?
Yes. The LeBlanc family continues to own and operate the business. The next generation is already involved.
What areas do you serve?
Most of southern New Hampshire, including Manchester, Bedford, Concord, Nashua, Salem, Auburn, Goffstown, Hooksett, Londonderry, Merrimack, Amherst, Hollis, Litchfield, Pelham, Windham, and surrounding communities.
What sets a family mechanical contractor apart from a national chain?
Continuity, long-term thinking, and community accountability. Decisions about how we work get made by the family whose name is on the truck.