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  1. #1
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    Default Am I figurin' right?

    I picked up a small Huppert heat treat furnace. It draws 15 amps at 110 volts.

    If I run it for one hour it will draw 1650 Watts (15 x 110). My electric bill rate is 9 cents a kilowatt hour. That leaves me with .09 x 1.650 which equals .1485 or about 15 cents an hour.

    It seems like a furnace that can get up to 1800 degrees or so would cost a lot more to run. Did I misplace the decimal? Is it $1.50 an hour? I am pretty sure it is not $15 an hour or more.

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    Frank,

    The line voltage is more like 120VAC these days. Or, are you actually measuring 110VAC under load?

    You have the calculation correct for the voltage and current shown. It's a resistance load, so the Power Factor = 1.

    You did forget to say "If I run it for one hour it will consume 1,650 Watt-hours or 1.65 KWh" (Watts are power; Watt-hours are energy.)

    Yes, it really will cost about 15 cents/hour to run at you stated rate of 9 cents KWh

    This is the magic of Reddy Kilowatts, your electric servant.

    John Ruth

  3. #3
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    Are you sure it only draws 1650 watts? I decent hair dryer draws more than that.

  4. #4
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    Thanks for the replies.

    The label says 110 volts so that is what I used for the calculation. But yes, I will have to add a little since it is no longer 110.

    The labels also says 15 amps.

    I guess the difference is the insulation.


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