Fans with lights: Calculations are performed without lights by default. If you add a light fixture to the fan, you can add the wattage of the fixture to the wattage of the fan to perform calculations with the lights on. In some cases, when a light fixture of known wattage is included with the fan, the option to calculate with or without lights will show automatically. The light fixture on a ceiling fan almost always uses substantially more electricity than the fan motor, so it is very important to take that into account when comparing the overall operational cost between various ceiling fans
Ceiling fans cool you off by creating a wind-chill effect, the degree of which is determined by the wind speed produced by the fan; the higher the wind speed, the cooler you feel. It is critical to know the following; CFM is not the same as wind speed; the wind chill effect you feel from a ceiling fan is concentrated in the column of air directly beneath the fan blades; the wind chill drops off dramatically just a foot or two outside that area.
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