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
Easy service access and quick component connections
Get the Boiler Only Heating 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 Heat Only Boiler from us?
9.7/10
215 reviews
5/5
1274 reviews
Justine V
Feb 06, 2025
Ian from Superior HVAC services recently replaced my furnace, and I couldn't be more satisfied with the experience. From the initial inspection to the installation, he was professional, knowledgeable, and efficient. Outstanding work!
D Roberge
Nov 06, 2024
Great experience with Superior Plumbing.Kurtis was accommodating and able to deal with logistic challenges I had on the work to be done.Very articulate and well spoken.
Wayne Edwards
Oct 31, 2024
The furnace installers were quick and thorough installed things perfectly, and I would recommend this company to everybody I know
Ivette ashleigh Ivette ashleigh
Mar 27, 2025
Replaced our failing pump quickly. Their guy named Raz tested everything before leaving—runs smoothly. Their tech guy named Brian was courteous and efficient.Excellent experience with Superior Plumbing and Heating
Brody Doerr
Mar 27, 2025
Every Spring I like to test out my AC system to make sure all headaches are avoided before the busy season this year it would not start… I called superior HVAc out they had Conner at my door with in 2 hrs. He tested my system for about an hour and found a coolant leak after a recharge of my system my Air Conditioner started working again!!! Highly recommend honest guy ask for Conner
We will deliver Heat Only Boilers to any of these cities
Feb 06, 2025
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