What is and why is the climate class of the refrigerator needed and how to understand which class will be better?
Choosing such an extremely necessary household appliances as a refrigerator, the consumer is guided by many nuances. For some, the main priority is the brand, for some, the type of freezing and the number of shelves is more important, but for others, the main focus is on energy consumption and appearance. But not every buyer guesses about such an important parameter of the refrigerator as its climatic class. When choosing, it is also important to consider it and not overlook it.
- What is climate class?
- Basic class classification
- Dual classes
- Features in the design of refrigerators of different classes
- So which climate class of the refrigerator is better?
What is climate class?
The refrigerator is a very expensive representative of household appliances. He is responsible for the freshness of products and for their preservation for a long time. Thanks to these factors, the choice of this technique should be taken very scrupulously. You should definitely focus on the climate class of the refrigerator, determining for yourself which one is best suited for specific operating conditions.
The climate class of the refrigerator means that the device fully complies with the climatic conditions in which it is supposed to be used. All refrigerators have certain conditions imposed on the external environment in which it will function. Simply put, this is the temperature inside the room in which the refrigerator will stand and work normally. Its use in inappropriate climatic conditions contributes to a faster occurrence of breakdowns.
Important. Failure caused by incorrect operating conditions leads to the loss of warranty repairs at the manufacturer’s service center.
Basic class classification
Manufacturers produce models belonging to four fundamental climate classes. On refrigerators, this or that class is indicated using letters of the Latin alphabet. Indicating in what range of external temperature the device should work normally. The designation of the climatic classes is standardized and uniform for the whole world. The designation does not depend on the country of manufacture and on where the manufacturer of household appliances is registered.
Class N (normal)
Normal, standard class, which has a huge number of models on the market. It means that a refrigerator with this marking will function normally at a temperature in the range of 16ºC (61 ° F) to 32ºC (90 ° F). For central Russia, this class is most in demand.
Second: SN (subnormal) class
Subnormal refrigeration units will function effectively in an ambient temperature of 10-32ºC (50 ° F – 90 ° F). Devices of this climatic class are mainly designed for operation in utility, utility rooms, in which there may be no heating. For example, a storage room, basement or garage.
Third: ST (subtropical)
This climate class assumes that the refrigerator is used in subtropical latitudes where the humidity is relatively high and the temperature range is 18-38ºC (65 ° F – 100 ° F). It is good to use a refrigerator with this class when living in the southern regions, where it is hot in summer and relatively warm in winter.
4th: T (tropical)
A tropical climate class will exhibit good cold production in hot, tropical climates. At the same time, without loss of efficiency in keeping the temperature at a low level inside the refrigerator. The temperature range for optimum performance of the refrigeration unit starts at 18ºC (65 ° F) and goes up to 43ºC (109 ° F).
Over time, manufacturers of household appliances began to supply refrigerator models to the market that belong to a dual climate class. This significantly expanded the scope of possible indoor air temperature. By the way, doubles, also sometimes called complementary, are also four.
- N-ST – this class says that the refrigeration device is capable of operating normally over a temperature range of 16 ° C to 38 ° C (61 ° F – 100 ° F)
- N-T – devices of this class are intended for operation in an ambient temperature of 16-43 ° C (61 ° F – 109 ° F)
- SN-ST – this marking provides a temperature range of 10-38ºC (50 ° F – 100 ° F)
- SN-T – refrigerators with this marking boast the widest temperature range, which is 10-43ºC (50 ° F – 109 ° F)
You can find information about the climate class of the refrigerator in the package of documents that come with the device. It can be instructions, rules of use and care, technical data sheet.
In addition to the documents, the climate class can be found on a special sticker (sticker), which is located on the back or inside the unit itself.
Before the manufacturer offers consumers a new batch of refrigerator models, the necessary tests and tests are necessarily carried out in conditions that will be as similar as possible to those where the devices are supposed to be used. When the climate class of the refrigerator meets the standards, which one is better to choose is completely dependent on the end user.
Features in the design of refrigerators of different classes
Each climate class has certain features in the overall design of the refrigerator. The general specifications for each class are also different. So, for example, there may be a difference in energy consumption, power, size. The main differences can be summarized in five names.
First. Power and performance of the motor-compressor
For refrigerators, the climatic class of which assumes a wide range of ambient temperatures, the compressor will have a high power. For example, the subtropical and tropical classes have a high-performance motor-compressor. It is he who allows the refrigeration unit to maintain a cold temperature inside the refrigerator, even when the outside space is hot.
Second. Electricity consumption
More versatile devices with a dual climate class, such as SN-ST or SN-T, are characterized by increased energy consumption. This is due to the fact that such models are designed to work in a wider range of ambient temperatures. Moreover, the electricity consumption cannot be reduced, even if in fact the refrigerator will be operated at lower temperatures. Therefore, choosing an SN-T class refrigeration device, and using it under conditions corresponding to N class, will be extremely wasteful for a family budget.
Third. Condenser area
Operating the refrigerator in a higher temperature environment requires an increased heat transfer area. For this reason, models in the ST and T grades have condensers and evaporators which have a large surface area.
Fourth. Insulation layer thickness
At low ambient temperatures, at which the refrigerator is designed to be used, a large insulating layer of thermal protection is not required. Therefore, in refrigeration units of the normal and subnormal class, the thickness of the thermal insulation layer will be less than that of refrigerators of the tropical or subtropical class.
Fifth. Materials used in production
Refrigerators whose class assumes their operation in conditions of high relative humidity requires materials that are resistant to mold and corrosion. The use of such materials also increases the final cost of the device.
So which climate class of the refrigerator is better?
It is necessary to choose the climate class of the refrigerator based on the conditions of the intended operation, that is, the temperature and humidity of the room in which the unit will be installed. Knowing the temperature and humidity indicators, it will be much easier to determine the class.
It may seem to many that it would be better to choose a model with a more universal class, for example, SN-ST or SN-T, since they can be used in the widest temperature ranges. But when choosing such a refrigerator, it is worth considering that the price of models with such versatility is higher. It is also important to remember about the higher power consumption of models with a dual climate class.
If you want to save money on buying a refrigerator, provided you live in a region with a cool climate, the option with a normal as well as subnormal class will be optimal for consideration. These devices will cost less and will work well when the ambient temperature is maintained.
In any case, when choosing the climate class of the refrigerator, it is better to take into account. This will allow the new device to serve for a long time without various unpleasant surprises.