Advanced user interface with Setup Wizard is made easy with backlit panel, click-wheel control and intuitive text.
Low gas pressure operation. Negative pressure regulating gas valveensures maximum performance all the way down to 3.5" of water column on natural gas and 8" of water column on propane gas.
Dual Venturi system creates better combustion control, turndown ratio and easy field gas conversions.
1/2" gas pipe capability up to 24' (subject to local codes). Cuts installation time, no need to install new gas lines for retrofit applications.
Patented stainless steel fire tube heat exchanger Navien’s innovative heat exchanger design is ASME‑Certified,“H” Stamped, and reduces high-stress point weld failures common on other combi-boilers.
NHB integrated control provides industry-leading options and features including adjustable heat capacity, temp boost for outdoor reset control, adjustable anti-cycle timer and freeze protection.
The condensing technology of the dual stainless steel heat exchangers saves energy, reduces greenhouse gasses.
1/2" gas pipe capability up to 24' (subject to local codes). Cuts installation time, no need to install new gas lines for retrofit applications.
The sophisticated gas flow control system provides a high turndown ratio which reduces energy waste and excessive boiler cycling.
NHB integrated control provides industry-leading options and features including adjustable heat capacity, temp boost for outdoor reset control, adjustable anti-cycle timer and freeze protection
The condensing technology of the dual stainless steel heat exchangers saves energy, reduces greenhouse gasses
2" venting up to 65'; 3” up to 150’ (including schedule 40 PVC)
The sophisticated gas flow control system provides a high turndown ratio which reduces energy waste and excessive boiler cycling
Integrated ECM pump and DHW diverter valve on all models
Small zone valve systems may not require an additional pump or a low loss header
Modulating Combustion up to 11:1
Models up to 96% AFUE
Wi-Fi on board for remote control and monitoring
Get the Gas Boiler High Efficiency in just a few steps
Make an order
Contact us to start the process of purchasing a new boiler. Our customer support team will guide you through all the necessary steps.
Arrival of a technician
Once your order is confirmed, we will promptly visit your location and conduct a thorough inspection, ensuring all necessary details are clear.
Delivery and installation work
We'll deliver the boiler to your location, and our experienced experts will handle the installation efficiently and professionally.
Get a warranty
You receive a warranty that covers various components and services, and when it ends, you can count on our post-warranty services.
Why should you buy a High Efficiency Boiler Natural Gas from us?
9.7/10
215 reviews
5/5
1238 reviews
Marina Ellis
Nov 18, 2023
Ryan is "the man". He was on time, answered our questions and did his best to install our new hot water tank. Thanks for the great job.
Nerwin B. De Leon
Mar 13, 2025
Great furnace repair service. Technician named Alvin byy was on time and very knowledgeable. Problem fixed, heat restored. Very pleased with the Superior HVAC service
Ivette ashleigh Ivette ashleigh
Mar 27, 2025
Replaced our failing pump quickly. Their guy named Raz tested everything before leaving—runs smoothly. Their tech guy named Brian was courteous and efficient.Excellent experience with Superior Plumbing and Heating
Rohan Clauwie Bagting
Feb 08, 2025
My happiness has been much enhanced by Excellent Superior HVAC. Brandon, the technician, was competent, effective, and provided comprehensive explanations of everything. In no time at all, my air handler is operating flawlessly once more. Excellent work!
fatma mahmoud
Jan 31, 2025
My furnace wasn’t keeping the house warm, so I reached out to Superior HVAC Service. Sean showed up on time, diagnosed the problem quickly, and had it fixed before I knew it. He also checked my water heater to ensure everything was working properly. Excellent service—highly recommend!
We will deliver a Boiler High Efficiency Gas to any of these cities
Nov 18, 2023
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