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
1180 reviews
Angelo Pascual
Jul 10, 2025
Service was excellent! Their tech guy Jemmar diagnosed a capacitor issue and replaced it promptly. Air is flowing working great again. Excellent experience with Superior HVAC, Heating and Air Conditioning
shahed alhalabi
Jan 31, 2025
Really good service
M Lukasik
May 27, 2025
Kurtis was very professional and easy to talk to. I would recommend him to anyone. Great job and fast.đź‘Ť
Hutt Ted
Oct 24, 2023
A few weeks ago I hired this company for water heater installation. They were very polite and extremely informative. I learned a lot about my HVAC system maintenance. Exceptional service!
MarĂa Conchita Fernández Vargas
Feb 6, 2025
Our water heater stopped working, and Superior HVAC came out the same day! Cameron was professional, quick, and super friendly. Highly recommend their services!
Michael LoStracco
Apr 29, 2025
The service was great they were able to get the part ordered in 2 days and were back to repair the furnace. The technician was very nice and knowledgeable and talked me through was needed to be repaired.It was a great experience from the frist phone call till it was fixed.
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 10, 2025
Ajax