Published evidence, one brand at a time
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Reading the results
Reported lifespan describes the average age of previous appliances when replaced. The source details explain which replacements each study includes. It does not predict when a current model will fail.
Early problems and first-year service show different parts of ownership. Comparisons use the same source, appliance design and age group; results from different studies stay separate.
Warranty and parts policies describe support. They do not measure lifespan. Each source opens with its study basis and relevant conditions.