Either way will work. If it blows up, the air goes up in the center
and down along the walls. If it blows down, then it will blow down in
the center and up along the walls. If you are right under the fan, you
will feel it more when blowing down. Then use down in the summer and
up in the winter. Asking your wife is always a good idea, if Mamma
ain't happy, ain't nobody happy. :-)

The room is essentially a closed system, the air circulates either way.
Do what feels best to you, it is YOUR comfort that matters. Furniture
placement and where You and Momma sit has a lot to do with it.

Stretch