I ran new wires through my walls, installed 20A twistlock (L620) 240V power. I was careful to go through the box and move the power supply switches from 115V to 230V before I switched the plug at the end of the wire, to avoid exploding power supply accidents. Turned on the breaker, turned on the switch, thought “huh, that fan runs faster than I remember,” and smelled a bit of magic smoke.
Yeah, there was one more component I wasn’t thinking about.
I ordered an EC fan as a replacement. It can take anything from 90V to 270V AC (or, I think, DC).