Any freezer that is Energy Star certified will consume very little (Under fifty dollars a year) in electricity.
General Electric have energy efficient models that you can purchase for just a fraction more in price.
Whats the fastest and most efficient
Cheat
Top-freezer refrigerators are generally the most energy efficient type compared to bottom-freezer and side-by-side models. This is because the freezer compartment is located above the refrigerator section, allowing cold air to stay in the freezer and prevent warm air from entering the refrigerator. Additionally, models with an Energy Star rating are designed to be more energy efficient overall.
Side-by-side refrigerators, with their large freezer capacity and convenient configuration, are the most popular refrigerator models. They are also the least energy efficient models. Most manufacturers offer a through-the-door ice maker /water dispenser as an option on all side-by-side. Top -freezer refrigerators are the next most popular model. These tend to offer smaller freezer compartments than side-by-sides and the freezer is at eye level.
Place in a freezer before filling
Whirlpool makes the most energy efficient freezers for the average homes, only costing approximately $29 per year to run.
According to consumer reports on different websites, the best upright freezer is the Frigidaire 16.7, but the competition is very tight amongst other brands like Kenmore and Whirlpool. These are trusted brands that have been around forever
Whats the fastest and most efficient
Because cold air rises, very little cold air escapes when you open the top-mounted door of a chest freezer, making it the most efficient style of freezers.
A Kenmore 13.7 upright freezer typically weighs around 160-180 pounds. It's always best to check the specific model's specifications for the most accurate weight.
The superlative of efficient is "most efficient."