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2 months agoYou’ll see this sort of thing in action when firefighters are ventilating a house with fans. They’ll move the fans back until the air stream covers the entire opening it’s aimed at. Any less and the spots the air stream doesn’t hit are gonna have air flowing the wrong way.
A good trick I’ve found is that fans in long hallways are markedly more effective than pretty much anywhere else.
Wait what did I miss?