> Fans are really best only while you are feeling the breeze directly Indeed! I use them thusly. This is kinda the genius of those Japanese fan-jackets. It's

> Fans are really best only while you are feeling the breeze directly Indeed! I use them thusly. This is kinda the genius of those Japanese fan-jackets. It's essentially a fan connected to a flexible person-shaped "shroud" (AKA a jacket) which makes sure all the airflow is actually directed over a person's skin. I was gonna invent something to solve exactly that problem you raise, only to realize Japanese inventors beat me to it. :-) P.S. The biggest noticeable effect of having the fan on during the day was to accelerate heat transfer through the hot gable ceiling to the indoor air. Predictably, forced fluid movement accelerates heat transfer, so the "heat battery" of stored up nighttime coldness would rapidly deplete in only an hour or so. During cloudy weather this effect was a lot less, because the ceiling wasn't baking hot.