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Main Types of Boilers Explained
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. The control valves within combi boilers work in different directions to one another.
Heat only boilers work by heating water and distributing it throughout a home using a system with various controls, including motorised valves, pumps and tanks. … The boiler will then heat the hot water cylinder, at which point the hot water is supplied to taps and showerheads when needed.
A system boiler works together with a hot water cylinder to provide central heating and hot water to our homes. The boiler heats water directly from the mains to warm up the radiators, and fills the cylinder with boiling water that’s used for our sinks, baths, showers and more.