Radiators are commonly used to heat buildings on the European continent. In a radiative central heating system, hot water or sometimes steam is generated in a central boiler and circulated by pumps through radiators within the building, where this heat is transferred to the surroundings.
Sure, radiators can be classified as a subtype of central heating, but “central heating” also describes furnaces, with ductwork that is not so easily shut off per room. You’re solely thinking of radiators, when that’s far from the only type of central heating system, and is certainly not the norm in places like the US.
Yes, radiators hooked up to a central heating system …
No, a water heater is not a furnace.
https://en.wikipedia.org/wiki/Central_heating
https://en.wikipedia.org/wiki/Radiator_(heating)
???
https://en.wikipedia.org/wiki/Radiator
This really isn’t rocket science.
Sure, radiators can be classified as a subtype of central heating, but “central heating” also describes furnaces, with ductwork that is not so easily shut off per room. You’re solely thinking of radiators, when that’s far from the only type of central heating system, and is certainly not the norm in places like the US.