Navien Condensing Tankless Water Heaters and Boilers
A.J. LeBlanc Heating installs and services Navien condensing tankless water heaters and combi-boilers throughout Southern New Hampshire. Navien's condensing technology delivers strong real-world efficiency, virtually unlimited hot water, and a compact wall-hung footprint that frees up basement space.
Navien Tankless Water Heaters & Boilers
Navien builds a full line of gas water-heating appliances: tankless water heaters, combi-boilers that handle both heat and domestic hot water in one wall-hung unit, and condensing boilers for hydronic systems. The condensing heat exchanger captures energy that vents straight up the flue on conventional equipment, which translates to lower operating costs and a smaller carbon footprint. A.J. LeBlanc Heating handles new Navien installs, scheduled maintenance, and repairs on existing systems throughout Southern New Hampshire.
Full Navien Lineup
- Navien Tankless Water Heaters
- Navien Condensing Gas Boilers
- Navien Combi-Boilers (Heat & Hot Water in One Unit)
- Navien Wall-Hung Boilers
- Navien High-Efficiency Hydronic Systems
Southern NH's Trusted Navien Installer Since 1928
Authorized Navien Dealer
We meet the manufacturer's standards for training, product knowledge, and installation quality, which matters for warranty coverage and long-term performance.
4th Generation, Family-Owned
Same family, same values since 1928. Thousands of Southern NH homeowners have trusted us with their hot water and heating.
Readers' Choice Winners
Voted best HVAC, plumbing, and electrical contractor by Southern NH homeowners year after year.
Installation, Service & Repair
We handle new Navien installations, routine maintenance, and repairs on existing systems. One call covers it all.
Ready for a Navien Installation?
Call or fill out the form below. A Home Comfort Advisor will review your needs, recommend the right Navien model, and provide a written estimate.
Get in Touch
Fill out the form and we'll get back to you. Usually the same business day. For emergencies, call us directly.
Schedule Online in 60 Seconds
Pick a date and time that works for you. Service, maintenance, or estimate visits, no phone tag.
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.