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 High-Efficiency Boiler 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
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'll deliver the boiler to your location, and our experienced experts will handle the installation efficiently and professionally.
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 from us?
9.7/10
215 reviews
5/5
1238 reviews
John Hoover
Nov 27, 2024
technician phoned to say he was on his way, very prompt and courteous, did a quick but thorough diagnios. no compliants
Thomas Drevniok
Jul 17, 2025
Great !
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!
Eirich Ydette Mendoza
Oct 20, 2025
Superior HVAC, Heating and Air Conditioning saved the day! Our water heater broke down on a Sunday, and they were here within hours. Fast, friendly tech named Kurtis and affordable. Highly recommend team!
Katrinajose Bacnat
Jul 10, 2025
Superior HVAC, Heating and Air Conditioning has a great team, with fast, friendly, and fair service. Tyler, the technician, fixed my ignition issue in under an hour and even took the time to check my thermostat before leaving.
Jesse Dhaliwal
Jul 02, 2025
Kurtis did an absolutely amazing job with my water heater. From start to finish, he was professional, knowledgeable, and took the time to explain everything in detail. He quickly diagnosed the issue, walked me through the options, and made sure the work was done properly and safely. You can tell he takes pride in his work and genuinely cares about doing things the right way. The whole process was smooth, stress-free, and I’m extremely happy with the results. I wouldn’t hesitate to recommend Kurtis to anyone looking for reliable, honest service.
Melinda Robb
Oct 14, 2025
Our water heater started leaking Friday afternoon heading into the Thanksgiving long weekend. We had been on borrowed time with it, and wanted to switch to tankless when it gave out. I called Superior around 3pm, and they had someone to the house within a few hours to have a look. They were able to book an installation Saturday morning, and Chandler had a new tankless unit installed and running by noon. He explained all the features and safety items to us, and told us to call right away if there were any issues. Overall, a great experience - thank you!
We will deliver a Boiler High Efficiency to any of these cities
Nov 27, 2024
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