Repeat the calculation for the various models that you are considering and then compare the second price tags.
You'll do well to consider the final figure as an absolute minimum cost. The energy efficiency of an appliance tends to drop over time: gaskets become worn or loose, refrigerants dissipate slowly into the atmosphere and cooling coils gather dust, reducing their efficiency.
Remember, it is the second price tag that you'll pay every month for the next decade or two.
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