Here are some measured facts:
A hot water heater set at 140 uses 4.9 KWH per day actualy experienced here in TV, or $.56. It is on an average of 8 minutes and 32 seconds for a household of 2. If you are after increased efficiency add reflective insulation to shave 4-7% off of that.
On the the the low cost ceiling fan myth:
A standard Villages grade interior 52" ceiling fan set on low 24/7 for a month draws 14.4 KWH or $1.66 each. Chances are you have several fans. While less than two bucks isn't expensive, as others have noted it is not helping humidity.
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