On Jun 29, 11:47*pm, mm wrote:
Six fans running at all times

I was at friends on Sunday, and it was 94 out and their AC was on, and
it was comfortable in the house, and they also had on 6 fans on the
first floor. *(Perhaps more in the finished basement where one son
lives.)

Each of the three bedrooms on the first floor had a ceiling fan that
was running; there was a whirring fan in the hall, on a 40" stand.

A table fan in the living room, and an oscillating table fan in the
dining room.

A couple and two grown kids live there, so never are all those rooms
occupied, and when they eat together, which is often and lengthy, only
one room is. *Most of the time, two, maybe 3 rooms have someone in
them.

It seems to me they're making it harder for their AC to keep up with
the hot outdoors, and at the very least, they're paying to run the 6
fans and then paying again to remove the heat the fans make, only a
couple of which are actually making them more comfortable. * * *

Is it worth saying anything to them?

Moving air feels cooler. If you use fans you can set the thermostat
higher. If they're happy I'd leave them alone.