Our 7 cubic foot chest freezer (which sits in our garage) consumes 1.1 kilowatt hours of power each day on average. A kWh costs 15–18 cents during the winter, depending on the time of day. The deep freezer costs roughly $7.50 per month to run in the summer. In the winter, when we need it for storage, it costs over $100 per month.
A standard freezer uses about 20 percent more electricity than a refrigerator, and a chest freezer uses even more. If you can afford to freeze your food at all, it should be frozen completely. This will use less energy and cost less too!
If you don't have room for a full-size freezer, consider getting a smaller model. They consume less electricity and cost less too. Also, consider using natural gas instead of electricity if possible. Finally, look into ways you can use cold frames or greenhouse glass to protect vegetables from the heat of the sun and wind. These methods can also help reduce your energy bill.
A chest freezer that is less than 16.5 cubic feet in size costs $53 per year and consumes 404 kilowatt-hours per year, or 34 kilowatt-hours per month. When you split $53 by 12, your monthly payments are slightly more than $4.7.
A chest freezer that is 16.5 cubic feet or larger uses 516 kilowatt-hours per year, which is about 50 kilowatt-hours per month. When you divide $516 by 12, your monthly payment comes to just over $46.
A wall-mounted freezer that is 13 cubic feet or smaller uses 382 kilowatt-hours per year, which is about 35 kilowatt-hours per month. A wall-mounted freezer that is 14 cubic feet or larger uses 504 kilowatt-hours per year, which is about 50 kilowatt-hours per month. When you divide the annual cost by 12, your monthly payment comes to about $43.
A self-contained refrigerator/freezer uses 740 kilowatt-hours per year, which is about 70 kilowatt-hours per month. When you divide the annual cost by 12, your monthly payment comes to about $60.
An ice maker with a remote-control sensor uses 25 kilowatt-hours per year, which is about 2.5 kilowatt-hours per month.
When compared to an older freezer, a new freezer will save you between $215 and $270 per year. These older freezers will consume around 750 to 1000 kilowatt-hours (kWh) of electricity each year. A new freezer is Energy Star rated and will use about 150 watts or less. It will take 10 years or more for old freezers to use up their initial cost savings of $10,000.
Freezing food preserves it by preventing bacteria from growing. As a result, food that is frozen will remain fresh longer. Freezing also slows the rate at which food absorbs moisture from the air, which means your foods won't go bad as quickly if you get caught in a rainstorm or have any other water damage. Finally, freezing prevents some flavorings and colorings from changing naturally due to oxidation.
Most freezers are electric. They work by using electrical resistance to freeze small quantities of food. This resistance needs to be kept clean, though; so food debris off of food itself or in the surrounding machinery will cause it to break down prematurely.
New freezers are available with different cooling methods for choosing what type of ice you want to store. Direct-expansion freezers use liquid nitrogen instead. This requires more expensive plumbing upgrades and can be dangerous if not used properly.
A freezer uses between 300 and 700 watts of power. A 13-cubic-foot frost-free freezer will consume around 300 watts, whereas a 20-cubic-foot freezer would consume 350 watts. In general, modern freezers consume less electricity than earlier models. Line-powered freezers require an outlet larger than 120 volts alternating current (AC) and 15 amperes (amps). The voltage may be either 110 or 120. The amperage should not be less than 15 or more than 20. Motors from 0 to 795 watts can be used for small freezers. Those from 796 to 1,191 watts can handle medium-size ones, and those from 1,192 to 1,491 watts can lift heavy loads.
Large freezers need motors up to 2,000 watts. These must be powered by circuit breakers or fuses because electric motors cannot usually be overloaded. Motors over 1,500 watts also tend to be air-cooled instead of water-cooled because they get too hot if immersed in a pool of water.
The average household in the United States uses 8,760 kilowatt hours (kWh) of energy per year. That's about $140 worth of energy costs, which is why most people want to cut back on their use of heaters and air conditioners during summer months. Freezers are no exception - they should be turned off when not in use.