Suitable for installation in flats and small to medium sized houses, the Worcester Bosch Greenstar 1000 GR1000W 24 C NG combi boiler is capable of delivering reliable heating along with hot water both a bath and a shower. Highly reliable and simple to install, maintain, commission and use, this 24kW unit has a compact design for mounting inside a kitchen cupboard, helping to save on space. ErP A-rated for its high levels of efficiency, the Greenstar 1000 incorporates a variety of features, including compatibility with load compensation controls, chosen to help save on fuel bills.