Mon Prof Augmenté
Hot water going round the house
Age 12 · Daily Life
A boiler heats water, and a pump pushes it through pipes to the radiators, which warm the rooms. The cooled water then flows back to the boiler to be heated again, so the same water travels round and round.
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In the picture
- Boiler: heats the water
- Pump: pushes the hot water round the loop
- Radiator: gives its heat to the room
- Return pipe: carries the cooled water back to the boiler
- Thermostat: senses the room temperature and tells the boiler when to heat
Examples
- A radiator is hot at the pipe’s inlet end and cooler at the other end because the water has given up heat.
- When you turn the thermostat down, the boiler switches off and the radiators slowly cool.
Key takeaways
- The water in a heating system is a closed loop: it is heated, travels, cools and returns.
- Radiators warm a room by passing the water’s heat into the air.
Quiz: Hot water going round the house (Age 12)
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What happens to the water after it has warmed a radiator?
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What is the job of the pump in a central heating system?
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How does a radiator warm a room?
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