Butonce you have a Setting (no matter 110, 120, 220, 230, 240) well spread and the appliances adapted to it, then it is a big step to jump out of the box and install something just "more Logical

Your220V device will be just fine, it is usually built to much wider tolerance. Europe have standardized from 220V-230V-240V systems to 230V around 1990-2000 and there were no widespread problems. Most chargers are 110V-240V anyways where the numbers are the "middle" of the voltage range anyways.

So starting in Germany around the turn of the century, they adopted the 220-volt (or 230- or 240-volt) standard. But the U.S. stayed with 110 volts (today it’s officially 120 volts) because we had such a big installed base of 110-volt equipment. But don’t worry that we’re stuck with a technological dinosaur. Fact is, homes with standard
Thedelta-delta vs delta-wye transformer stuff was really interesting. It sounds like my initial explanation is correct then. 208V/1Ph and 230V/3ph are both not options using a 240/120V panel or a 208/120V panel, but there are less common distribution systems where you might find the transformers tapped that way.
220Vis the old nominal value for most European networks, before it was changed to 230, I guess this might be an older device. Since the defined tolerance is 10%, this should be absolutely safe to run. Especially a heating element, worst case, just avoid the highest setting. For a heating appliance, Hz is irrelevant.
Thestandard household voltage level in US homes is 120V AC- single phase. While the 120V is used for lighter loads, 240V split phase voltage is also commonly available for higher loads. It means, mostly both 120V and 240V is available from a main panel. While the rest of the world, especially the IEC following countries in the EU and UK, uses
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220v vs 230v vs 240v