Thread: Wood Stove Fan
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Old 01-02-2011, 10:51 PM   #18
SteveA
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Default More Math...

Here's the formula to figure the cost of running any electrical device:

wattage x hours used ÷ 1000 x price per kWh = cost of electricity

For example, let's say you leave a 100-watt bulb running continuously (730 hours a month), and you're paying 17.64¢/kWh. (current PSNH rate is 17.64¢)

Your cost to run that bulb all month is 100 x 730hrs ÷ 1000 x 17.64¢ = $12.88

The watts listed on an appliance is the number of watts used per hour.

If your fan doesn't list wattage, but it does list amps, then just multiply the amps times the voltage to get the watts. For example:

2.5 amps x 120 volts = 300 watts

You're correct, I did base my number on 200 watts from the chart. I should have added " Your Mileage may vary!"

Happy New Year NB!
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