F/15/[email protected]Jul 10, 2024

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?

https://sh.itjust.works/post/22037698

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? - sh.itjust.works

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)

Show threadvivavideriJul 10, 2024
Well, the folks over at noctua have fan shenanigans down to a fine science, and since I have generally forgotten the last rabbit hole I went down, I’d say get two fans and have one blowing in and the other out, lol.
Show threadfranglaisJul 10, 2024
This is the wrong application, noctua are looking for static pressure, what OP wants is to maximise airflow. Mathias wandel has some pertinent videos on the subject, the ideal is a large fan about a metre or two away from the window, depending on the size of the fan, blowing hot air outside.
Show threadsneekee_snek_17Jul 10, 2024
Why so far from the window?
Show threadSzethFriendOfNimi

I think you get the benefit of the airflow pulling in air along its edge to push out with it.

Like pushing a bunch of water with a broom removes not only the water in front of the broom but also more water due to surface tension and inertia

Jul 10, 2024 at 5:07amWeb
Show threadShepherdPieJul 10, 2024
It’s called the venturi effect.
Show threadfranglaisJul 10, 2024
In this case it’s called the brunelli effect
Show threadsneekee_snek_17Jul 10, 2024
Ohhhhhh the bernoulli effect?
Show thread667Jul 10, 2024
no no, it’s the Magnum effect.
Show threadkakesJul 10, 2024
It’s called the linguini effect.
Show threadTiefling IRLJul 10, 2024
Good ole vermicelli effect
Show threadAltima NEOJul 10, 2024
Ah yeah, the Dom Mazetti effect
Show threadChee_KoalaJul 10, 2024
Its called the Chimichurri effect
Show threadHupfJul 10, 2024
The Bozzetto effect?
Show threadPeppycitoJul 10, 2024
It’s called the kimchi effect
Show threadKillerTofuJul 10, 2024
It’s the butterfly effect.
Show threadFeathercrownJul 10, 2024
Oh yeah the bruscietta effect