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
4.9/5
1197 reviews
amanda degyves
Feb 13, 2025
Kurtis and the team at Superior HVAC did a fantastic job installing our new high-efficiency furnace. Our home heats up so much faster now!
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!
Laurier Team
Mar 13, 2025
Our furnace suddenly stopped blowing warm air, and we were freezing! Conner quickly diagnosed the issue as a bad blower motor and had it replaced the same day. He explained everything in simple terms and even checked the rest of the system to make sure we wouldn’t have more problems. Super professional and friendly—highly recommend!
Chamodi Dharmarathne
Feb 8, 2025
Superior HVAC Services came to the rescue when our water heater broke. Georgewas knowledgeable, friendly, and explained all our options. The repair was fast, and the heater works great now. Will definitely use them again!
Георгий Клименко
Feb 7, 2025
My elderly mother's furnace went out on a cold night. Superior HVAC Service prioritized her call and got someone out there within an hour. Mark was incredibly kind and patient, and he got the furnace working again quickly. I can't thank them enough!
женя Шишкин
Feb 3, 2025
My water heater suddenly stopped working so I called Superior HVAC Service. Alvin arrived right on time, fixed it quickly and did a great job. He also checked my heater to make sure everything was working smoothly. The whole job was flawless and I would definitely use them again!
Kimberly Gonzaga R.
Jul 5, 2025
Water heater leaking—repaired same day. Clear communication with their tech guy named Drewand clean work. No more worries with Superior HVAC, Heating and Air Conditioning
Jrald Bagnol
Jul 10, 2025
The technician named Kurtis was knowledgeable and nice. He even clean up the mess. Diagnosed the issue and had parts on hand. Heat restored quickly with no mess left behind. Excellent team Superior HVAC, Heating and Air Conditioning
We will deliver Navien Heat Only Boilers to any of these cities
Feb 13, 2025
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