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
Get the Navien High-Efficiency 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
We will deliver the boiler to you. Our team will handle the installation with efficiency and professionalism, ensuring a seamless setup.
Get a warranty
You receive a warranty that covers various components and services, and when it ends, you can count on our post-warranty services.
Why should you buy a High Efficiency Boiler Navien from us?
9.7/10
215 reviews
4.9/5
1200 reviews
Antonino Soriano
Mar 13, 2025
Great repair service! Their tech guy named Brian were knowledgeable and fixed the issue with my air handler quickly. I'm very satisfied with their work. Great job Superior HVAC
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!
Igor Kuritsyn
Feb 7, 2025
Our boiler suddenly stopped producing heat, and with freezing temperatures outside, we needed help fast. Cole from Superior HVAC Service arrived quickly, diagnosed a faulty pressure valve, and replaced it on the spot. He also flushed the system to remove any buildup that could cause future problems. He was efficient, polite, and made sure everything was working perfectly before leaving. Really grateful for the quick response and great service!
Aron Brager
Jul 15, 2025
Daniel showed up exactly on time. Same day within two hours of the initial call. He and his team were polite, professional and made every effort needed to complete the job in a timely manner. These folks worked well past midnight and replaced a broken AC beyond my satisfaction in less than 6 hours. I highly recommend Daniel and the team at Superior HVAC services.
Josh Taylor
Mar 27, 2025
The guys who came to my house were great. They got the job done on time and were respectful and professional.
Lourence Agasang
Jul 9, 2025
Daniel, the technician, was knowledgeable and courteous, quickly diagnosing the issue and restoring heat with no mess, showcasing Superior HVAC's excellent service.
Kei Cordeta
Jul 16, 2025
Service exceeded expectations. Technician named Drew arrived on time, explained everything clearly, and fixed the heating element. Hot water’s running great. Thank you Superior HVAC, Heating and Air Conditioning
We will deliver a Navien Boiler High Efficiency to any of these cities
Mar 13, 2025
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