Navien NCB700 42KW Combi Boiler + Flue

Sale price£1,545 GBP
Only 6 units left

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Navien NCB700 42KW Combi Boiler + Flue

The game-changing NCB700 ON combi gas boiler from Navien is the first product of its type capable of delivering hot water to three bathrooms simultaneously. Shattering all preconceptions of a combi boiler’s suitability for large properties, the NCB700 ON cleverly maximises recirculation of domestic hot water (DHW) to significantly reduce water wastage and offer flow rates up to an industry-leading 22 litres per minute (at 35°C temperature rise).

  • Built-in DHW recirculation pump for super fast hot water delivery

  • Powerful 54kW hot water output delivering up to 22lpm

  • Industry-leading turndown ratio of 15:1 for supreme efficiencies

  • Easy to use built-in digital display panel displays energy usage

  • 12-year warranty for complete peace of mind

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

  • NaviCirc™ for simple and fast set up of hot water return system

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

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

  • 3-zone ready with Smart Plus control pack

NCB700-2S+/42K NCB700
Heat Output
Modulation (max/min) 10:1 15:1
Heat output range @ 80/60°C 34.0/3.4kW 34.0/3.4kW
DHW DHW heat input range 40.6/3.5kW 52.4/3.5kW
DHW output range 42.0/3.5kW 54.0/3.5kW
DHW flow rate @ 25°C temp. rise. 24.1l/min 31l/min
DHW flow rate @ 30°C temp. rise. 20.1l/min 25.8l/min
DHW flow rate for kitchen @ 45°C temp. rise. 13.4l/min 17.2l/min
Flue Flue Size Coaxial length Ø 60/100
Max. horizontal coaxial length Ø60/100 20m
Max. vertical coaxial length Ø60/100 21m
Weight Lift weight 39 46
Dimensions Width x Depth x Height 440 x 335 x 695mm
ErP Efficiency ErP A (94%)
ErP Efficiency with Single Smart Plus ErP A+ (98%)
NOx Classification Class 6

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