I'm finishing a new basement bathroom and just tried the exhaust fan, and it appears to be blowing the wrong way. I can feel air blowing downwards, and the horizontal backdraft fins on the outside exhaust vent (it's just above ground level, on the house wall) are fully closed.
This is a brand new NuTone fan and it came with the metal box. I'm pretty sure it's all installed correctly and I don't think it's physically possible to put it in the wrong way.
The plug seems to have no polarity (2 identical flat prongs), but I tried it the other way just for shiggles and it made no difference.
Looking at the fan itself and just applying basic physics seems to indicate that it should spin the other way. As it currently stands, my understanding is that it's scooping air from the outside and pushing it into the middle, while it should be doing the opposite. Am I going crazy here? Pictures show the fan rotation. As I understand, this is a typical centrifugal fan and the wiki article seems to support my understanding that the blades should be curved AWAY from rotation. https://en.wikipedia.org/wiki/Centrifugal_fan