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A standard upright negative 80 degree freezer. An ultra low temperature (ULT) freezer is a refrigerator that stores contents at −80 to −86 °C (−112 to −123 °F). [1] An ultra low temperature freezer is commonly referred to as a "minus 80 freezer" or a "negative 80 freezer", referring to the most common temperature standard. [2]
In the early 1990s a competition was held among the major US manufacturers to encourage energy efficiency. [39] Current US models that are Energy Star qualified use 50% less energy than the average 1974 model used. [40] The most energy-efficient unit made in the US consumes about half a kilowatt-hour per day (equivalent to 20 W continuously). [41]
A solar-powered refrigerator is a refrigerator which runs on energy directly provided by sun, and may include photovoltaic or solar thermal energy. Solar-powered refrigerators are able to keep perishable goods such as meat and dairy cool in hot climates and are used to keep much-needed vaccines at their appropriate temperature to avoid spoilage.
For refrigerating appliances, such as refrigerators, freezers, wine-storage appliances, and combined appliances, the labelling is specified in terms of an energy efficiency index EEI, which is an indication of the annual power consumption relative to a reference consumption that is based on the storage volume and the type of appliance (refrigerator or freezer).
House Energy Rating, a building's thermal performance for residential homes in Australia; Home energy rating, a measurement of a home's energy efficiency, used primarily in the United States; National Home Energy Rating, an accreditation scheme for energy assessors and a rating scale for the energy efficiency of housing in the United Kingdom
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