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
Get the Condensing Boiler Gas in just a few steps
Make an order
Order your new boiler today by contacting us. Our dedicated customer support team will assist you through all the necessary steps.
Arrival of a technician
Once the order is confirmed, our skilled technician will promptly arrive at your property to conduct an inspection and clarify any details.
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
Our warranty covers various parts and services, and even after its expiration, we provide reliable post-warranty services.
Why should you buy a Natural Gas Condensing Boiler from us?
9.7/10
215 reviews
4.9/5
1201 reviews
Alex Patton
Jul 14, 2025
My technician Tyler was really friendly,explained things well, and took me seriously when the issue I called about wasn't happening immediately. Appreciated his service
Adrienne reenel Viana
Feb 9, 2025
On the coldest night of the year, our furnace broke! Excellent Superior HVAC arrived in a few hours and promptly got it fixed. Kurtis, the technician, was amiable and competent.
Ángeles TC
Feb 8, 2025
Alec was a lifesaver when our water heater suddenly stopped working. He replaced it the same day, and now everything runs perfectly!
ritchie mallari
Mar 11, 2025
Professional and efficient furnace repair.The tech guy named Cameron was knowledgeable and friendly.Five stars Superior HVAC
john paul tabud
Feb 7, 2025
Ian came to repair our furnace, and his work was exceptional. He clearly explained the problem, fixed it promptly, and even shared tips for prolonging its lifespan. I highly recommend Superior HVAC 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.
We will deliver a boiler condensing gas to any of these cities
Jul 14, 2025
Ajax