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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 - enough hydronic heat for a whole house, plus hot water to run two showers and a dishwasher all at the same time.

• Duel inputs: Up to 120 MBtuh for heating and 199 MBtuh for DHW
• 4.5 GPM at 77 degree temperature rise for domestic hot water
• Turn-down ratio of 6:1 for heat and 11:1 for DHW
• Dual stainless steel heat exchangers
• Field gas convertibility for NG to LPG
• PVC Venting: up to 60 Ft. with 2 in. or 150 Ft with 3 in.
• Uses existing 1/2 gas line
• Linkable with our NPE units for high DHW capacity