NCB-E Series


Supporting your green building reputation

Professionals can now recommend a single solution for both DHW and whole house comfort.

Navien NCB-E is the first true all-in-one condensing tankless water heater and boiler system that has the capacity to heat a large house and provide all the DHW for the whole family. Now you can design, specify or install one unit with two capacities, saving space, energy and water.

  • Separate heat exchanger for domestic hot water creates the highest flow rate in the industry.
  • The highest energy efficiency in the industry — up to .95 AFUE.
  • Energy Star certified.
  • Backed by the industry’s strongest warranty — 10 years on heat exchangers.
  • Takes about 80% less space than floor standing boiler and tank water heater.
  • Can be cascaded with Navien NPE water heater for extraordinarily large demand.
  • Easy to use control panel.
  • Elegant, clean appearance.
  • Ideal for replacements or new construction.

Space saving design occupies 80% less space than a traditional floor standing boiler and tank water heater.


Innovations make Navien condensing combi-boilers the best choice for homeowners

  • Dual stainless steel heat exchangers last longer than copper

  • Condensing technology reduces energy consumption and greenhouse gas emissions

  • Optional NaviLink™ Wi-Fi control system gives you access to your Navien systems from anywhere in the world

Protect the environment as you add value

Navien primary condensing stainless steel heat exchangers recover extra heat that would be lost in non-condensing tankless heaters to reduce energy consumption and CO2 emissions. That keeps exhaust temperatures very low — so low that economical Schedule 40 PVC pipe can be used for venting in almost all applications.

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