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Navien NCB Boiler

#1 of 1 Navien Boilers

Updated: Jun 6, 2016

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Overview of the NCB

The Navien NCB is a condensing gas combination boiler with an efficiency rating of 95.0% AFUE. It was named an Energy Star Most Efficient 2015 product and is available in three models -- NCB-180, NCB-210, and NCB-240. It is designed to save space and occupies up to 80% less space than a traditional floor standing boiler with tank water heater. The NCB features dual corrosion-resistant stainless steel heat exchangers with a separate stainless steel flat plate heat exchanger for domestic hot water. The system can use 2" PVC for venting up to 60 feet and can easily be converted from natural gas to propane operation. For situations with very high domestic hot water demands, the NCB can be cascaded with Navien's NPE tankless water heaters.

Consumer Reviews of the Navien NCB

Compare to Other Navien Boilers:
  • Very Satisfied
  • Somewhat Satisfied
  • Neutral
  • Somewhat Unsatisfied
  • Very Unsatisfied

Date created: 2015-11-16 Location: San Diego, CA

Satisfaction Rating:

5 of 5 stars

"My personal boiler review"
I have owned my Navien boiler for almost two years now. I have been living in the same house with 3 of my friends for these two years, and it has been working with no problems since then. I like how quiet and efficient it is and honestly I have no complaints about it. I would definitely recommend this boiler to anybody looking for a new one because it is the greatest one I have ever owned.

Date created: 2015-04-24 Location: Anchorage, AK

Satisfaction Rating:

5 of 5 stars

"Efficient heat compared to forced air"
I had my boiler installed last fall (September 2014) and I love it. We converted to a hydronic air handler from a traditional natural gas forced air furnace. I feel it delivers a much more even heat and is a lot more efficient. I also like the fact that we have essentially unlimited hot water now as well. I have recommended this unit to several of my friends. If I buy another property, I would definately invest in the same setup. Lastly, I really appreciate the small form factor it has, it freed up some room in my garage.

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Other NCB Reviews

Online reviews of the NCB appear to be mixed. On heatinghelp.com, a post from a homeowner trying to choose between the NCB and a similar Lochinvar unit found most replies favoring the Lochinvar, although one member stated that he liked his NCB and had no problems with it. In another post on the site a member mentions that Navien has updated their boiler line three times in five years, and for that reason he cannot support the product.

NCB Warranty

The warranty for the Navien NCB boiler is comprised of the following:

  • 10-year heat exchanger warranty
  • 5-year parts and other components warranty
  • 1-year labor warranty

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