GUSTOIMAGES / SCIENCE PHOTO LIBRARY GUSTOIMAGES / SCIENCE PHOTO LIBRARY
Gas boiler, coloured X-ray. This type of boiler is typically found in a kitchen, where it heats water used in a household central heating system. The electronic control system (bottom centre) is used to set the temperature and times on which the heating switches on. Inside the combustion chamber (purple, centre) is the heat exchanger (gold), which transfers the heat from the gas flames to the water. A flue (chimney, upper right) is also seen. A fan (red) at the base of the flue aids the extraction. The pink box around this unit prevents any carbon monoxide from leaking into the room, helping to prevent accidents.
Model release not required. Property release not required.