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
Get the Navien Condensing Gas Boiler 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
After confirming your order, our technician will arrive at the appointed time to inspect the property and clarify the necessary details.
Delivery and installation work
After the assessment, we will deliver the boiler to you. Our experts will carry out the installation efficiently and professionally.
Get a warranty
Our warranty covers various parts and services, and even after its expiration, we provide reliable post-warranty services.
Why should you buy a Condensing Gas Boiler Navien from us?
9.7/10
215 reviews
4.9/5
1201 reviews
John Akritidis (20 Cent John)
Jul 11, 2025
Best service!! 👌
Рома x
Feb 3, 2025
My boiler stopped heating properly, so I called Superior HVAC Service. Sean arrived promptly, found the issue right away, and had it fixed quickly. Before leaving, he also checked my furnace to make sure everything was running efficiently. The service was professional, seamless, and exceeded my expectations!
Macy Mirka
Jul 29, 2025
Would highly recommend! Our AC broke in the heat wave and they were super quick to come check it out and were able to fix it next day :)
Perry Meredith
Oct 25, 2023
This HVAC company is without a doubt the best when it comes to getting things done. You can be sure that the work will be completed well and that the people who come to your house will respect your time. They only hire technicians with licenses and experience!
Charles Hendrich “cha” Antipuesto
Jan 29, 2025
Huge thanks to Jacob of Superior HVAC and air conditioning for your prompt action in replacing parts of my old furnace. It runs like it was bought yesterday. Good job!
jose jauregui
Apr 30, 2025
Same day that I called they showed up.Drew was polite and thorough with his assessment. He provided detailed information and let me know my options.
Gaye Normandin
Jul 27, 2025
I was very pleased with the service I received from the technicians who installed my air conditioner and the service person(Sean) who visitedme to determine the problem with my old a/c.Everyone was very knowledgeable, professional and extremely helpful. Iwill definitely call Superior HVAC for any future work!!
We will deliver a gas boiler Navien condensing to any of these cities
Jul 11, 2025
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