Combi boilers are the most popular heating and hot water solution in the UK. Over 15 million have been fitted across the country and they are now the preferred choice for most householders and installers. Worcester was the pioneer of the combi boiler in the UK, with the Greenstar range developed to suit virtually all homes.
All Worcester Greenstar oil combis are designed and manufactured to provide high levels of performance and operating efficiency. This is achieved through features such as the ‘keep hot’ facility (which ensures hot water is almost instantly available) and the Heatslave II’s in-built thermal store which enables the boiler to provide instant hot water for prolonged periods.
What is a thermal store?
A thermal store is a small tank integrated in the Greenstar Heatslave II combi, with the store containing the same water that is found in your radiators. By storing heat within the hot water store, the Heatslave II can instantly heat (via a heat exchanger) the cold water that enters the boiler and then passes to your hot tap or shower, increasing your hot water comfort.