Viessmann High-Efficiency Condensing Boilers
A.J. LeBlanc Heating installs and services Viessmann condensing boilers throughout Southern New Hampshire. Our factory-trained team selects the boiler around the home's heat loss, radiation, zones, water temperatures, venting, fuel, and control needs.
Viessmann Boilers
Viessmann offers gas condensing boilers and integrated hot-water options for residential hydronic systems. A.J. LeBlanc Heating installs, maintains, and repairs Viessmann equipment throughout Southern New Hampshire and compares the selected model's output, turndown, venting, controls, warranty, and installed cost before recommending it.
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.
Full Viessmann Boiler Lineup
- Viessmann Condensing Gas Boilers
- Viessmann Oil Boilers
- Viessmann Combi-Boilers
- Viessmann Wall-Hung Boilers
- Stainless-Steel Heat Exchanger Construction
A Trusted Viessmann Installer in Southern NH, Family-Owned Since 1928
Authorized Viessmann Dealer
Our Viessmann factory training supports correct boiler selection, installation, control setup, and service for the home's heating system.
4th Generation, Family-Owned
Same family, same values since 1928. More than 30,000 Southern NH customers have trusted us with their heating.
Readers' Choice Winners
Voted Best HVAC, Best Plumber, and Best Electrician in the Union Leader Readers' Choice Awards by Southern NH homeowners year after year.
Installation, Service & Repair
We handle new Viessmann installations, routine maintenance, and repairs on existing systems.
Ready for a Viessmann Installation?
Call or fill out the form below. A Home Comfort Advisor will review your needs, recommend the right Viessmann 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.
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.