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
1182 reviews
Dan Drakeford
Jul 08, 2026
Great job, fast service, thank you!
Deb Oldfield
Jul 07, 2026
Overall, I had a good experience. The repair turned out to be much more complicated than anyone expected, and in the end my air conditioner needed to be replaced rather than repaired. While it was frustrating to be without A/C during an extreme heat wave, the team was responsive, kept me informed, and worked to get everything resolved. The new unit is working great, and I'm very happy with the final result. I appreciate their professionalism and would recommend them.
Chandra Vanderboom
Jul 07, 2026
Superior was quick to service my broken water heater; next-day service and I had a new heater up and running. Very professional and friendly.
hirdthis
Jul 02, 2026
Technician came and accessed the problem installed new unit same day. Highly recommend.
Stuart Hiller
Jun 10, 2026
We had persistent humidity and mold issues in our bathrooms and the team assessed the whole ventilation system. They upgraded the exhaust fans and tied them into proper exterior venting. the moisture problem is completely gone
yo vendo
May 21, 2026
Excellent service from start to finish. The team was professional, punctual, and completed the air conditioning installation quickly and efficiently. They took the time to explain everything clearly, kept the work area clean, and made sure the system was working perfectly before leaving. Very friendly and easy to deal with. I’m very satisfied with the overall experience and would definitely recommend them to anyone looking for reliable HVAC service.
Tom Corley
May 05, 2026
Drew is a really cool guy 👍
Brenda McComb
Feb 06, 2026
Excellent service in very tough conditions!
Krista Gaereminck
Jan 27, 2026
This was for my mom, she said they were fast and efficient
Janice Hurlbut
Jan 26, 2026
I would give Superior HAVAC a 4.5because the service was very good. Our furnace broke on one of the coldest days in the winter and they sent a technician as soon as they were able in the morning after a call to them at 8pm the previous evening. Nick the technicianfrom Superior HVAC was courteous, efficient, professional and provided a clear explanation about what he thoughtthe problems could be and possible solutions. The furnace was about 20 years old so we opted to get a new furnace. Nick spoke to his supervisor to arrange for a new furnace to be installed ASAP on the same day. The furnace was installed during a snow storm but the installers were also very professional and did an excellent job. Fortunately we had heat that evening before another freezing day and another big snow storm.
BHARATH Binuraj
Jun 25, 2026
Our smart thermostat installation was completed professionally and without any complications. The technician walked us through all the settings before leaving
KEN YOO
Apr 25, 2026
Thank you for handling the work diligently and responsibly.
We will deliver a boiler condensing gas to any of these cities
Jul 08, 2026
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