[Eileen]

It is not optimum, but I know people who have done it.

I tried taking classes at a studio where they had a large (think attic fan) fan in an end wall, up high. They did not use it because of the noise. I got a headache and sometimes nauseous from it, and quit the class and eventually set up at home.

I got an inline fan, and DH put it in a piece of plywood I could put in a window, then put some metal tube (ductwork, dryer?) to focus the intake to where I needed it.
I periodically light some incense or use a match that I blow out to make a visible smoke, and check to see how strong the pull is.

If you do use a box fan, I wonder if you could make something to focus the air pull in the same way.

As above, many people have started outside if that is an option. so consider that also.

I'm not sure where you are, but some places will allow you to rent space.