Last but not least, we incorporate survey data collected from CR members on thousands of refrigerators to judge predicted reliability and owner satisfaction for each brand and refrigerator type. Our engineers then use these measurements to calculate energy efficiency. In addition, we measure usable storage capacity, which rarely matches what manufacturers claim. To test the freezer compartments of refrigerators, our engineers fill the appliances with boxes and boxes of frozen spinach, then evaluate how well they keep the packages frozen. The results reveal that many refrigerators simply don’t do well at their primary task, and that could mean more wasted food and bigger grocery bills. We use that information to determine which refrigerators keep food fresh longer. CR’s test engineers collect more than 5.4 million temperature readings for each model to detect warm and cold spots.
We then monitor it for more than a month in a temperature-controlled chamber to evaluate thermostat control and temperature uniformity. In our lab, each refrigerator we test gets wired up with temperature sensors. Our testers are constantly evaluating new models and adding them to our refrigerator ratings, which include models in all configurations: bottom-freezer, top-freezer, built-in, counter-depth, French-door, and side-by-side.
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