“Thin” so the window won’t be far enough open for a person to fit through
“Sideways” so it can go in a sliding window rather than a double hung window.
“Thin” so the window won’t be far enough open for a person to fit through
“Sideways” so it can go in a sliding window rather than a double hung window.
Check out vornado. They make, or at least used to make, a few models that might fit your needs. I’ve had one of their vent fans for a couple of years now, and it gets the job done well. Definitely not going to leave a gap anyone can get through, puts out good air flow when blowing in, plus can serve to vent air outside when needed. But they’ve got other options.