Yes, it is generally better to use a dehumidifier with a higher energy efficiency rating, as this can help you save on your electricity bill and reduce your overall energy consumption. Dehumidifiers with higher energy efficiency ratings will use less power to remove the same amount of moisture from the air, which means they can operate for longer periods of time without consuming as much electricity. This can be especially beneficial if you need to run your dehumidifier frequently, or if you are using it in a large space. The energy efficiency of a dehumidifier is usually measured using a rating system called Energy Star, which is a program established by the U.S. Environmental Protection Agency (EPA) to promote energy-efficient products. Dehumidifiers with an Energy Star rating are designed to meet specific energy efficiency guidelines set by the EPA, which means they will use less power than non-certified models. It's important to remember, though, that dehumidifiers with higher energy efficiency ratings might also cost more upfront. To decide whether a higher efficiency rating is a worthwhile investment for your specific needs, you must balance the upfront cost of the unit against the potential long-term savings on your electricity bill.