Near as I can tell on my 32n, that is just a fan that sucks air from the hall (presumably warm) and blows it into the bathroom. Fairly useless. We bought a small ceramic heater to heat the bathroom. Works well.
Thanks. That is exactly what I was thinking. It seems connected to that hall vent. I just couldn't figure out why it was blowing air, as opposed to the air just flowing through from the hall, but a fan would explain it. I guess I understand how that would heat the bathroom in theory but it doesn't work in practice. Thanks for the help.