Dual Venturi system creates better combustion control, turndown ratio and easy field gas conversions.
2" venting up to 65' (including schedule 40 PVC).Vent Installation Detector (VID) for added safety.
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.
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
Buy new Boiler Viessmann Heat Only in just a few steps
Make an order
Contact us to buy a new boiler. Our team will guide you every step of the way and help you choose the right model.
Arrival of a technician
Once your order is confirmed, we will promptly visit your location and conduct a thorough inspection, ensuring all necessary details are clear.
Delivery and installation work
We will deliver the boiler to you. Our team will handle the installation with efficiency and professionalism, ensuring a seamless setup.
Get a warranty
We offer a warranty that covers different parts and services. Even after the warranty expires, you can rely on our post-warranty services.
Why should you buy a Boiler Heat Only Navien from us?
9.7/10
215 reviews
4.8/5
0 reviews
Javier Lopez
Feb 7, 2025
Our water heater broke down unexpectedly, and George had a new one installed the same day. Fast, reliable, and incredibly professional!
Khadidja Humad
Jan 31, 2025
Professional and FastWe’ve been having issues with our thermostat, so I called Superior HVAC Service. Liam arrived on time, diagnosed the problem right away, and had it fixed in under an hour. He was professional, friendly, and even took a moment to check the entire system to make sure everything was in working order. Highly recommend!
Виталий Четверин
Feb 6, 2025
Our gas fireplace wouldn't light. Superior HVAC Service sent Maria, who quickly cleaned the pilot light and got it working again. She was friendly, efficient, and charged a very reasonable fee. Highly recommend!
Carlos Hooks
Dec 12, 2023
Highly recommanded...
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!
Louie Pantzouris
Jan 9, 2025
My neighbor recommended superior, i had an issue with my furnace shutting down for no apparent reason. It happenedcouple of times. So I called my neighbors recommendation and george was the service tech that was sent. I mentioned to himwhat the furnace was doing and he got to work. After diagnosing the furnace he came upstairs explained to me what the issue was and that it's fixable and not to worry. Cost of the repair was less thanI expected and the service was great. Thank you george.
Labrini Smirnis
Jan 9, 2025
Had a great experience with George… he is so friendly and polite. Very professional and very knowledgeable. Thank you George!Definitely recommend… won’t disappoint.
gerardo albeto maycruz
Feb 3, 2025
Reard fixed our boiler during an emergency, and I couldn’t be more grateful. His speed, skill, and professionalism were incredible
We will deliver Navien Heat Only Boilers to any of these cities
Feb 7, 2025
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