Hypothesis: running a ceiling fan backwards in the winter will move
warm air from the ceiling downwards.

Room: 18 foot by 13 foot, slanted ceiling 12 foot high at one end of
the long side, 9 foot high at the other. Two normal size doors, both
open. Hunter fan on 3 foot (i think) rod with 100 watt light (on)
operating in reverse (upwards) at low speed.

temp: (3 digital thermometers, all gave same reading when side by side)
outside temp at start: 39 degrees. inside temp at center of wall at
tall end of room (inside wall) 4 foot up, 60 degrees. inside temp at
center of long wall (inside wall) 2 foot up, 58 degrees. 51% humidity
in room.

results: when fan was turned on, 2 foot up thermometer gradually rose
from 58 degrees to 62 degrees over an hour and more or less stabilized.
4 foot up thermometer didn't change. Outside temp dropped to 32
degrees. when fan was turned off, 2 foot up thermometer dropped to 57
degrees over an hour. 4 foot up thermometer dropped to 59 degrees.
outside thermometer died, maybe it got too cold for the halfdead
batteries.

subjective results: observer sitting next to 2 foot high thermometer
(me) noted that despite rising temp, it felt chilly with the fan on,
even though no obvious draft was evident. similarly it felt warmer when
the fan was turned off, even though it was cooling down.

conclusion: leave the fan off, I guess.

Figure out how much power the fan draws, and get
a heat-lamp of roughly the same wattage.