The interior of your house is hot, the exterior cool. What would the most efficient orientation be for a box fan? Pushing hot air out of a window or pulling cool air in through it? (Solved)*

WolfdadCigarette@threads.net@sh.itjust.works to No Stupid Questions@lemmy.world – 136 points –

Secondarily, should the fan be outside or inside the window?

Asking for a friend. (Me, help. I can’t remember physics, it’s too goddamn hot)

Edit: I’ve opened all the windows and set up a fan a short distance from the window pointing out and it’s reduced the temperature to near-tolerable levels. Unfortunately, venting through the attic was a no-go but moving things aside might make it an option next time. Thank you all, I appreciate the help!

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https://www.youtube.com/watch?v=1L2ef1CP-yw This is the best way to get what you want.

This guy seems to have a different goal then OP. He just wants the max airspeed in other parts of the house

The goal is the same.

Scenario: cold air outside, hot air inside.

Goal: replace hot air inside with cold air outside.

Method: open one intake window and one exhaust window. Use a fan to blow hot air out the exhaust window while the low pressure vacuumed created inside will cause cold air to be sucked in through the intake window.

Maximize efficiency of method: follow video posted.