Simple & intelligent control options available, optimising boiler efficiency & fuel consumption Condenses in central heating & domestic hot water modes for optimum efficiency during operation, Comfort & ECO modes to suit hot water delivery needs, Fully modulating pump for reduced electricity consumption & quieter operation Built-in frost protection of the boiler & the surrounding pipes 5 year boiler guarantee terms & conditions apply (standard guarantee: 2 years) 5 year guarantee on plate heat exchanger* 10 year guarantee on Worcester primary heat exchanger* Boiler protection plans available