How does a combi boiler heat water - How does a combi boiler work

A combi boiler works by taking water directly from the mains. When you turn on a hot water tap, the gas burner is ignited and a powerful system called a heat exchanger transfers the energy to the water. This system allows hot water to be generated almost instantly.
How does hot water work on a combi boiler?
Combi boilers provide a “combination” of instantaneous hot water and effective central heating. Combi boilers work by signalling a sensor once you've requested hot water which tells the boiler to burn fuel (whether gas, electric or oil). The heat exchanger then gets hot enough to heat the water when it flows over it.
How does a boiler heat water in a conventional or system boiler?
Put simply, a gas boiler heats up water. It does this by pumping the circulated water in pipework over a series of gas flames. As the water passes the flames, it is heated up, just like water in a pan or kettle. This water serves two purposes in the modern home: central heating and providing hot water.
How long does a boiler take to heat water?
The average gas heater takes between 30 and 40 minutes to fully heat up the water in a hot water cylinder. The average electric heater takes about twice as long as the average gas heater to fully heat up the water in its tank, so you can expect it to take between an hour and an hour and 20 minutes to heat up.
Ask Dave, he is a Gas Safe Engineer if you would like to speak to him or text him - 0772 286 6616
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