Okay, I bought a new window fan. Not one of those old fans, that was once called a box fan (I think) that you just heaved up into the window! But this is ones with the two motors and fan blades that fits nicely in the window. Anyway, it has separate speed controls for each one of the fan blades, and you can even have one blow in and one suck out (stop smiling - my censor is working a bit better today!) So I go to set the fan and get this - our mind set is now that...