On Thu, 03 Jul 2014 18:18:43 -0700, wrote:

...snip....
space in the winter. Depending the use of the space, summer may
require up or down. If air conditioned you can get away with keeping
temps at least 4 degrees warmer if you keep the fan running down
because the light breeze helps cool.
Running the fan UP draws the cool air from the floor up to the ceiling
and circulates the air across the ceiling to spill down the walls.
Doesn't work as well with "architectural" ceilings.

I just put 2 70 inch fans in the office - 6 speed - running down on
4th speed -13 and 15 foot ceilings with architectural features -
(former theatre)

wow, sounds neat!

just got done with a 'side by side' comparison;
DOWN is HOTTER than no fan! even though the air hits you more directly
just seems to become hot air.
UP is COOLER than no fan! keep getting cold drafts from every side. well
'cool' drafts.