With Bernoulli’s principle in mind (I think that’s the right one), is it more efficient to vent a room by putting a fan back from a window a bit, or right up next to it, and if so, is there a general sweet-spot as to how far back it should be?

Question

For context, this would be to vent a basement bathroom with a a window in an old house, and I can’t install a bathroom vent.

In: 857

Answer 1

Open a door or window.

Put a fan outside of this opening, facing the opening. 3-4 feet back.

Open a window on the opposite side of the area you’re trying to ventilate.

You will be introducing positive pressure into the area and ventilating it through the opening on the back side.

This is the most common way fire fighters ventilate structures to clear them of heat/smoke quickly.