Which method is more effective (and why) for recirculating air into a room: a) using a fan to blow air out of a window, or b) using a fan to blow air in through the window?

Question

For context, I’ve got a basement room in an old house that isn’t tied in to central air conditioning, and sometimes the air gets a bit stale.

It has a basement window, so I’ll open that up and stick a fan in the window to blow air out, but someone told me that it’s better to have the fan outside and pulling fresh air in.

The room won’t be overpressured as it’s got a big gap under the door, and the fan doesn’t cover the whole window.

In: Physics

Answer 1

What id do is open the basement window, then open the door and another window in the house. Then have the fan blow out the basement window (try both, I’m not sure which will week better). Get one that covers the whole window if possible.

My parents house has this on a larger scale and it cools the whole house in like 15 minutes if its cool out