Furnace

A Furnace is a device used for heating. The word has different meanings, though:

In American English, it is the name for a heating system in the house. British English usually calls such systems boiler, heater or kiln.
There are industrial furnaces; these provide the heat so some process can take place. An example of such a furnace would be the use in metallurgic processing. Blast furnaces for example make iron.

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