Central heating

The term central heating covers hydronic heating systems with a central boiler or furnace either inside the building being heated or in the immediate vicinity.

The term central heating covers hydronic heating systems with a central boiler or furnace either inside the building being heated or in the immediate vicinity.

Heat is generated in the boiler. Pipes carry the heated water to the building’s heat sources (radiators) and return the cooled water to the boiler again.

Originally, many central heating systems were designed to be self-circulating. Now a circulator is always used to pump heat through the system.

A central heating system is a closed system with either an expansion tank or open expansion vessel. A buffer tank can also be installed in the system.

A wide range of fuel types are used in central heating. Coal, coke, wood, oil, gas, wood chips and wood pellets have all proven adequate fuel sources in central heating boilers.





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