The advantages of a chest freezer are that it is economical and energy-efficient. A chest freezer has fewer compartments and shelves, which allows it to offer sufficient food storage space. Most chest freezers are equipped with manual defrost, which is more energy-efficient than automatic defrost.
In the event of a power outage, a chest freezer has built-in sidewall insulation that allows it to hold its cold temperature well and for a long period. Because of the effect of gravity on the top door seal, a chest freezer is tightly sealed and less likely to let air in. An unplugged chest freezer is capable of keeping food contents frozen for two to three days.