Power failure autonomy
The amount of time the freezer keeps food cold enough when the refrigeration system is turned off, for example, due to a breakdown or power outage. Technically, the power failure autonomy for each model is calculated differently; For example, for a freezer with an operating temperature of -18 ° C, this is the period during which the products in the chamber heat up from -18 ° C to -9 ° C. To sum up, the time is indicated during which the frozen products are guaranteed not to heat up to a temperature at which they could lose their properties.
Door alarm
It is a system that monitors the closing of the freezer door. If the door is not closed for a long time or is not closed tightly enough, an audible or light (depending on the model) signal is given. It helps to avoid a critical increase in temperature in the working chamber and preserves the quality of the products.
Cold accumulators
The presence of removable refrigerants (cold accumulators) in the freezer design. This solution allows you to extend the temperature retention time in case of a power outage and also allows you to take it with you for use outside the freezer if necessary.
Energy consumption per year
It is the average amount of energy consumed by the freezer in a year of operation. Of course, these figures are not absolutely accurate. The actual power consumption may vary depending on the specific operating conditions. However, this parameter makes it possible to evaluate the consumption of the device and compare different models with each other. At the same time, it often turns out to be more convenient and visual than the energy consumption class (see above) because, in this paragraph, we are talking about a specific figure (from which you can also calculate the cost of electricity consumed).
Noise level
The average noise level generated by the freezer during operation. The quietest models give out about 25 - 30 dB — this is the average noise background in a residential area at night (comparable to the ticking of a wall clock); the loudest — is about 60 dB (loud conversation). More detailed comparison tables can be found in special sources.
In any case, the lower the noise level, the more comfortable the use of the unit. However, it does not always make sense to look for the
quietest freezer: in some situations (for example, in a noisy workshop), the freezer's sound may be lost against the surrounding noise background. In addition, reduced noise often affects the price.
Country of origin
It is the country in which, according to the manufacturer, this or that model is manufactured. Even though most of the capacities are concentrated in China, European factories for the production of household appliances have not disappeared. And some models can be produced there. In general, such a division into a Chinese or European factory should not particularly affect the quality of products, but the stereotype of a reliable European assembly is present. However, it is possible that the model may have a country of manufacture, for example, Poland, and in the store under the same article, you will meet China.
