Navien NCB300 41kw Combi Boiler + Flue, (5 Year Warranty)

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Navien NCB-30041K
41KW Combi Boiler + Flue
(5 Year Warranty)

The NCB300 gas condensing combi boiler is our entry model, which offers the same hot water comfort, powerful heating and flexible installation options as larger models, but in a compact design. This combination of features makes the NCB300 gas boiler an excellent choice for smaller properties where exceptional levels of reliability and DHW performance are the priority.

  • ErP A+ energy efficiency rating for ultra-low running costs*

  • IPX5 rating provides protection from any water leaks

  • Smartphone compatible offering remote adjustments of heating and hot water systems

  • Smart weather forecasting and Geofencing maximise efficiencies and convenience

  • 5-year parts and labour warranty for complete peace of mind

  • Extended venting up to 8m

  • Stainless steel heat exchangers for optimum durability and long term efficiencies

  • Hydrogen-ready (20% blend) technology for futureproofing

  • Flue Included


Heat Output Heat output range @ 80/60° 26.0/4.5kw

DHW output range 37.0/4.6kw
DHW Flow Rate @ 25° Temp 24 L/Min
DHW flow Rate @ 35° Temp 20 L/Min
DHW flow Rate for Kitchen @ 45° Temp 13 L/Min
Modulation TDR 6:1
Flue Flue Size Coaxial Length 60/100
Max Horizontal Coaxial Length 8m
Max Vertical Coaxial Length  8m
Weight Lift Weight  33kg
Dimensions Width x depth x height 395 x 285 x 680
ERP ErP Effeciency ErP A (93%)
ErP effeciancy with Smart Plus x3 ErP A+ (98%)
NOx NOx classification Class 6





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