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
816 reviews
Marian Bagui
Feb 4, 2025
I had my water heater’s gas valve replaced, and the experience was great! Ian was skilled, efficient, and got the job done quickly. Everything is working perfectly now, and the service was both reliable and reasonably priced. I would definitely recommend them for any water heater repairs!
Jack Kiriln
Sep 20, 2023
Honest, incredibly knowledgeable and reliable! They took the time to explain everything we needed and provided a detailed quote. The best heating contractor!
Richard Brown
Sep 20, 2023
Thanks to their expertise, my weekend was not spoiled due to a broken air conditioner. Their HVAC repair expert quickly arrived at my apartment and fixed the unit without a hassle. Nice!
Roman May Arjona
Feb 7, 2025
Excellent service! Cole did and amazing job with our boiler, he came to fix it within one hour after we called, he explained the issue and he was so skilled
Clara Martin
Feb 7, 2025
Kurtis and his team installed our tankless water heater, and we couldn’t be happier. Professional, clean, and extremely knowledgeable!
We will deliver a boiler condensing gas to any of these cities
Feb 4, 2025
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