Just bought a couple of Opolar F51 fans. They are very quiet and move a lot of air. USB powered.
I am thinking about mounting them in the upper crown molding in the push-out. This places them almost right above our faces in the D Model Murphy bed, and easily powered from USP ports on each side pedestal. They could be permanently mounted and (just barely) clear the sheets when the bed is retracted. However i am leaning towards some easily removable mounting method.