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.