I was in a large public room last week, with 30 foot ceilings, and 7
ceiling fans spinning, on poles that put the blades about 10 feet
below the ceiling. The blade asssemblies were 3 or 4 feet in
diameter. All but one fan was running about 100 rpm, and the one fan
was 2 or 3 times that speed, and I couldn't feel any breeze from the
I certainly understand using c.fans in the winter, to blow the hot air
that rises to the ceiling back down to the people who are closer to
But when AC is on, wouldn't it be better to let the cold air sink to
near the floor and let the hot air 25 feet up just stay up there??
Today I was in a large public room with 10 foot ceilings and a whole
bunch of fans mounted to the ceiling with blades about 1 foot below.