Energy Star small refrigerators are certified by the U.S. Environmental Protection Agency for meeting defined efficiency standards compared to baseline models. The label indicates lower energy consumption under test conditions, but real world savings depend on usage, size, placement, and operating environment. In continuous use or multi unit settings the savings can be noticeable, while in small or infrequently used fridges the difference is often modest. Overall the certification is best understood as a standardized efficiency benchmark rather than a guarantee of significant cost reduction.