With its compact 283mm depth, the NCB500 ON boiler fits easily into any cupboard, making it the perfect solution for homes with limited space. As part of the ON range of The NCB500 ON boiler can deliver hot water outputs of up to 41kW, while achieving an industry-leading ErP efficiency of 93%. It also features an integrated, user-friendly digital display panel. This text-driven interface allows for easy programming, a two-channel timer, and energy usage monitoring, making it both simple to operate and highly efficient." combi boilers, it puts hot water first. Thanks to advanced features such as the state-of-the-art flow adjustment valve and auto mixing valve, the ON range ensures a steady supply of hot water without any fluctuations in temperature or flow rate.