You can turn on a fan as a light, but you can’t say Alexa turn on the Fan and just have it turn on the Fan in that room.
On further consideration, it might be possible to do this with Echo speaks.
If you have a single simulated Fan switch that tuns on when you say turn on the Fan. Then look from which Echo you spoke to when that switch activates with getactivity and turn on the fan in that room. Really not that complicated a piston. I might have to try that.
Although you probably won’t be able to say “Turn on the Fan” as that will probably conflict with the Alexa general commands.
Edit:Only took about 10 minutes to write that up and it’s working pretty well.
I created a simulated switch called RoomFan and whatever room I am in if I say turn Roomfan on or off it turns that Fan on or off.