Deborah Preuss, pcc 🇨🇦 on Nostr: so, I live in a long, narrow flat. If there's no wind, and the house is hot but ...

so, I live in a long, narrow flat. If there's no wind, and the house is hot but outside is cool, how do I use it? Do I need two: one to push hot air out, another to pull cool air in?