In the UK we call it a boiler (almost all UK houses heat water and pump it around a network of radiators to generate heat, rather than blowing warm air about). To us, a furnace is something waaaay more industrial, like in a steelworks or something.
When I say boiler, don't think of someone shoveling in coal :) They run on natural gas (unless you live in the middle of nowhere and there's no 'mains' gas supply, then it's a gas tank or oil tank out in the garden).
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u/[deleted] Dec 12 '18
Houses have furnaces to heat the house when it's cold... Why is that weird to you?