SHEILA TERRY / SCIENCE PHOTO LIBRARY SHEILA TERRY / SCIENCE PHOTO LIBRARY
Household boiler (white cabinet above fruit bowl), mounted on the wall of a kitchen. This is a gas boiler, which burns natural gas, heating water for use in the kitchen, as well as baths, showers and radiators. This boiler is a modern type known as a condensing combination boiler. It is more compact and more efficient than older systems. It heats water directly from the mains, instead of storing hot water in a storage tank. It also extracts as much energy as possible from the system by passing the flue gases (products of burning the natural gas) through a condensing heat exchanger to obtain more heat. Both features save on energy and fuel costs. This is a Greenstar 30 He Plus Combi boiler from Worcester, Bosch Group. For the controls, see H130/496.
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