We encourage the use of ceiling fans! Especially in energy efficient houses because they make such an impact.
A tighter, more well insulated house already requires less heating and cooling -as you know -and it shortens the heating season and shortens the cooling season. (The amount of time you have the heat turned on during the year, and the amount of time you have the AC turned on during the year)
Fans make the cooling season even shorter. Instead of using air conditioning - say 30 -60 days during the summer -you may use AC only 5-10 days during the summer.
Our houses are designed for cross ventilation and fans. Cross ventilation alone is good, but if you add fans it makes it much more useful/ efficient- especially at night.
How about with a geothermal system?
"We have a geothermal system. Does this still apply? The cooling comes so efficiently from that system."
Well, it costs electric to run the cooling for the geothermal (pump and fans). I guess its the difference between the electric for geothermal and fans...which is more? I just asked my contractor bud and he said fans would be cheaper than running the geothermal for sure.