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Navien NCB Combi-boiler

Finally, a combi-boiler strong enough to support heating and DHW for the whole house.

Features

Overview

Navien NCB is the first high efficiency tankless condensing combination boiler with the capacity to supply both heat and domestic hot water for larger homes and enough hydronic for a whole house, plus hot water to run two showers and a dishwasher all at the same time. In addition, the NCB takes up to 80% less space than a traditional floor standing boiler and tank water heater. 

Here are some of the top features of the Navien NCB:

Efficiency rating of up to 95% AFUE.

ENERGY STAR® certified which means it meets or exceeds U.S. federal guidelines for energy efficiency.

Low gas pressure operation negative pressure gas valve ensures maximum performance all the way down to a minimum gas pressure of 3.5" W.C.

Electronic ignition control burns fuel only when necessary, reducing energy costs.

Dual inputs of up to 120k BTU/h for heating and 199k BTU/h for DHW supplies all the heat and domestic hot water that most houses require.

PVC venting low exhaust gas temperatures allow use of PVC, CPVC venting systems

Quiet Operation

  • Sealed combustion—minimizes fan noise and provides quiet, soothing heat

Home Comfort

  • Modulating capability—allows burner to fire at a rate as low as 20% of its full capacity to perfectly match your comfort needs

Energy Efficiency

  • ENERGY STAR® certified—meets or exceeds EPA guidelines for energy efficiency, which means energy savings
  • Electronic ignition control—monitors water temperature and maximizes efficiency by turning on the burner only when needed
  • Turn down ratio of 6:1 for heating and 11:1 for DHW the sophisticated gas flow control system provides a high turn down ratio, reducing energy waste and excessive boiler cycling and enhances temperature control for DHW

Reliable Performance

  • Dual stainless steel heat exchangerresist corrosion better than copper to provide longer life
  • 10-Year Limited Warranty on heat exchanger
  • 5-Year Limited Warranty on covered components

Product Brochures and Manuals

Navien NCB Combi-boiler

Certifications

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