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Can I afford to replace that freezer?

November 19, 2011
Kill-A-Watt electric meter

Kill-A-Watt electric meter

Let’s see; our old chest freezer, though bigger than we need now, is working fine.  As it has been since about 1972, actually.  That is a high-quality appliance, no?  Why would I want to replace it?  Well suppose I bought one of those Kill-A-Watt electric meters for about twenty-five bucks.  I’ve been measuring different things to get a bead on where energy is being wasted.

P3 Kill-A-Watt data from old chest freezer

P3 Kill-A-Watt data from old chest freezer

I tried it on the freezer and here’s the result, written in Sharpie marker on the freezer lid.  The well-made old freezer devoured 12.95 kwh in 60 hours.  There are 146 60-hour periods in a year. Times 12.95 kwh equals 1,890… times the EPA standard of 10.65 cents per kwh, means that freezer costs me $201/year to operate.  (Our electricity rate may actually be a bit higher than that here).

A new freezer is $300, and by the same standard uses $35/year electricity.

There’s more: Ameren will come haul the old freezer away AND give us a $50 credit on our electric bill.

So that puts the payoff right around 18 months, followed by… bacon!

This is why I think cars should have gas mileage meters instead of tachometers. Sometimes the right information can have a clarifying effect.

NOTES:

  • This post has been edited for accuracy – see the first two comments.
Categories: Uncategorized
  1. November 19, 2011 at 11:40 | #1

    I don’t agree with your arithmetic. Surely that should be about 200 $/yr to operate?
    And 200-35=165. So 300-50 = 250 / 165 = 18 month ROI.

  2. dof
    November 19, 2011 at 12:05 | #2

    You’re right; I dropped a zero! Which makes it $200/yr to operate. This may be the reason my 3′d-grade arithmetic book said it was a bad idea to do arithmetic while moving a loaded freezer, all covered with dust.

    Well If I have to wait 18 months for bacon, forget it. I’ll just take the new freezer back.

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