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Navien Boilers Boiler Efficiency Rating

ModelTypeFuelEfficiency
Navien NCB-20LHWECondensingGas89.1%
Navien NCB-23LHWECondensingGas89.2%
Navien NCB-24LDWECondensingGas89.0%
Navien NCB-28LDWECondensingGas89.1%
Navien NCB-28LHWECondensingGas89.1%
Navien NCB-33LHWECondensingGas89.2%
Navien NCB-34LDWECondensingGas89.0%
Navien NCB-40LDWECondensingGas89.1%
Navien NCN-21KCondensingGas89.4%
Navien NCN-25KCondensingGas89.0%
Navien NCN-32KCondensingGas89.1%
Navien NCN-37KCondensingGas88.9%