"iBuyMinis" wrote on 02 Aug
2003:

"And leave the ceiling fan off when you aren't in the room."

I respectfully ask why?

Because moving air cools people by making perspiration on the skin
evaporate - so the person feels cooler. But moving the air around
doesn't make the air any cooler. That's why weathermen talk about
a wind chill factor.

IF you have a really high ceiling in the room, a ceiling fan can
push the warm air near the ceiling down to the floor, making the
lower part of the room warmer in the winter. But in summer natural
convection will carry the warm air to the ceiling anyway. That's
what the cupolas on the 18th and 19th century houses were for -
natural whole house fans.

Bottom line: if no one is in the room, the fan is just using
electricity in the summer if the house is closed up to air
condition. It's not making the air any cooler.

--
Doug Boulter

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