This is pretty impressive and super fun for a homebrew project, and definitely far outside what I have the patience for (and let’s be real, skill for, too). But it does highlight the 1200000% difference between hacking and engineering. (Actually that difference should be far greater, since that sensor is more…

I’ll add that Sunpentown Box Fan (I guess it’s the SF-1413) is a fantastic fan that isn’t as readily available in stores, but can be found on Amazon (or your asian appliance store of choice...which is where I got mine):

A lot is done with modeling, but you always prefer to have test data when possible. Modeling is done because you don’t have the money, time, or sanity to test every single specific configuration. However, you can use knowledge of the physics to interpolate the more-benign cases in between. You would probably do…