The Navien NCB500 ON 32kW gas combi boiler offers superb hot water comfort, powerful heating and flexible installation options, making it the ultimate all-rounder for modern family homes. Every model features high-quality components to provide exceptional levels of reliability and performance. Thanks to Navien ON technology, the ground-breaking Combi Crossover boilers have the power and performance of a system boiler and the advantages of a Combi boiler without the cylinder, eliminating slow heat-up times and low flow rates. By putting hot water first, Navien's innovative ON technology removes the fluctuation between hot and cold by providing quality, consistent and efficient hot water. With Navien ON, the possibilities are endless. Key Features: Easy to use built-in digital display panel displays energy usage. Hydrogen-ready (20% blend) technology for futureproofing. Smartphone compatible offering remote adjustments of heating and hot water systems, via app. Smart weather forecasting and Geo-fencing maximise efficiencies and convenience. Fitting comfortably inside a cupboard with ease due to a compact 283mm depth, this energy-saving boiler boasts the same high-quality construction as the NCB700. It can achieve hot water outputs of up to 32kW while boasting an industry-leading ErP efficiency of 93%. Plus, thanks to Navien's state-of-the-art flow adjustment valve and auto mixing valve, the NCB500 is able to provide lots of hot water, with no changes in DHW temperature or flow rate. The boiler also features a built-in, text-driven digital display panel; simple to program and use, it includes a two-channel timer and allows energy usage to be monitored with ease. Features & Benefits: Stainless steel heat exchangers for optimum durability and long-term efficiencies. State-of-the-art flow adjustment valve and auto mixing valve for superb hot water comfort. Turndown ratio of 6:1. Compact dimensions for easy cupboard fit. Easy to use digital display panel. Built-in pre-installed boiler set-up wizard. Hydrogen-ready (20% blend) technology for future proofing. Compatible with Navien Smart Service Toolkit. ErP A+ energy efficiency rating when used with 3 Smart Plus room thermostats (multizone heating). Navien Horizontal Flue included. Smartphone compatible offering remote adjustments of heating and hot water systems. Smart weather forecasting and Geofencing maximise efficiencies and convenience. Flow rate (at 35°C temp rise): 13.1 L/min DHW Output Range: 32.0/4.6kW Heat Output Range at 80/60°C: 26.0/4.5kW