Navien NCB Series

The only compact combi-boiler strong enough to support DHW and heating for the whole house

Navien NCB-E is the first high efficiency condensing combination boiler with the capacity to supply both heat and domestic hot water for larger homes — enough hydronic heat for a whole house, plus hot water to run two showers and a dishwasher all at the same time.

  • The highest energy efficiency in the industry—up to 95.0% 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

NCB-E Applications

  • Air handler
  • Hydronic heating
  • Hydronic fan coil
  • Baseboard radiator
  • Radiant floor