I love those little fans. I think that they punch far above their weight for ventilation. Worked well in the 19, even better in the 21 blowing air into the end of the bed where there's no natural ventilation.
I put one of a thin strip of aluminum that hangs from a hook. It's by the open window and because it's hanging it rocks back and forth, unpowered oscillation.
Quiet and a gentle breeze, not too much and not too little.
The direction can be tweaked by rotating the hanging arm, it's somewhat flexible.
Works for me.
Ron
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