Tankless Water Heater
Installation in Southern NH
A.J. LeBlanc Heating installs Navien and Rinnai tankless water heaters across Southern NH. We size the system for the home's incoming water temperature and simultaneous demand so it can deliver continuous hot water while using less floor space than a storage tank.
Tankless Water Heater Installation
A tankless water heater heats water only when it is needed instead of storing a full tank at temperature. A correctly sized system can provide continuous hot water within its rated flow. A.J. LeBlanc Heating installs Navien and Rinnai systems and coordinates the gas, venting, electrical, and plumbing work required for the installation.
- Navien and Rinnai tankless installation
- Continuous hot water on demand when properly sized
- Uses less floor space than a storage tank
- Compact wall-mounted, frees up floor space
- 15 to 20+ year lifespan vs 10 to 12 for tanks
- All gas, venting, and electrical work included
Combination Heat & Hot Water
Navien and Rinnai combi-boilers handle both space heating and domestic hot water in a single wall-hung unit. For homes with hydronic (hot water) heating systems, this eliminates a separate boiler and water heater, saving space and reducing equipment costs. The condensing combi units we install reach 95%+ AFUE efficiency.
- Space heating and hot water in one unit
- Replaces both boiler and water heater
- Condensing efficiency, 95%+ AFUE
- Ideal for homes with baseboard or radiant heat
- NHSaves rebates may apply
- Required permits and inspections handled
Recent Installations
Tankless Water Heater FAQ
How much does tankless water heater installation cost?
A tankless water heater installation in Southern NH typically runs $4,800 to $9,200 installed depending on venting requirements, gas line work, and any electrical upgrades needed. We provide free written estimates.
How long does installation take?
Most tankless installations take four to six hours. More complex installations involving new gas lines or venting routes may take a full day.
Do I need to upgrade my gas line?
Sometimes. Tankless heaters have a high BTU demand when firing, which can require a larger gas line than what served your old tank. We check this during the estimate and include any required gas line work in the quote.
Are there rebates for tankless water heaters?
NHSaves offers rebates on qualifying tankless units through some utility programs. We check current availability at the time of your estimate.
Get a Free Tankless Water Heater Estimate
Get continuous hot water from a properly sized system. We'll assess your home, recommend the right system, and give you a written quote upfront.
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.