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
244 reviews
Jerry Tuckner
Dec 12, 2023
When I called them, the repairman was courteous and helpful.They did their job in time.
Aries Geoffrey
Oct 23, 2023
The guys did a great job servicing my heat pump. Everything is working even better than I expected and they left my place cleaner than when they arrived. Don't hesitate to call them!
Romeo Len
Oct 26, 2023
At last, my hot water heater is working as it is supposed to. Thank you very much for your dependable, prompt service and attention to customer needs, from the first phone contact to the completion of the repair!
Gabriel Landon
Jan 10, 2024
Just a few highlights of this service they are fast they deal with really complicated problems they can get all the needed spare parts quickly.I highly recommend them. Great team.
Mark Betty
Nov 19, 2023
He was very friendly and we were happy that he came to service our furnace.
Olive Vogt
Nov 28, 2023
Very professional services
Jon White
May 24, 2024
Great work.
Petar Stankov
Jun 19, 2024
We had a water heater leak on Monday and Brian came out the same day, assessed the situation and provided us with expert advice to help us make the decision to replace.We received our new water heater the next day! It was installed quickly and professionally and the technicians were tidy and efficient.I got a crash course on the ins and outs of the new system, how to maintain it, and was provided with information about an optional service plan and my 1 year parts and labour warranty.I felt thoroughly taken care of throughout the entire process and cannot recommend this team more highly- top notch from start to finish!
We will deliver Navien Heat Only Boilers to any of these cities
Dec 12, 2023
Ajax