When choosing a new refrigerator, buyers are often faced with colorful stickers on the body or price tag, where the class is indicated in large letters energy efficiency. For many, this is just a formality, but it is this characteristic that determines how much money you will pay for electricity every month over the 10–15 years of the unit’s service life. The difference between classes A and B may seem insignificant at first glance, but upon closer examination it results in significant amounts.
The modern market of household appliances is oversaturated with models of various brands, and understanding the principles of labeling helps not to overpay for extra kilowatts. The refrigerator is the only appliance in the house that works around the clock, never turning off, except during defrosting or repairs. Therefore, the question of consumption class A and B - what is the differencebecomes key when forming a budget for utilities.
In this article we will analyze in detail the technical nuances behind the letters on the label and find out whether it is worth pursuing a higher class or you can save money by purchasing a less efficient model. You will learn how efficiency is calculated and why old designations are gradually becoming a thing of the past, giving way to new standards.
What is an energy efficiency class
An energy efficiency class is an indicator characterizing the efficiency of use of energy resources by refrigeration equipment. Simply put, this is the ratio of useful work (cooling and freezing) to the energy consumed. The higher the class, the less electricity the device “eats” to maintain the set temperature inside the chambers.
Historically, the marking developed from the letter D to A+++, however, in recent years, the European Union and other markets have begun to introduce a new scale, where the letters from A to G again dominate. encourage manufacturers to create even more fuel-efficient models, as the old standards have been achieved by most brands. In the context of older and transitional models, we often see precisely the comparison between Class A and Class B.
The determination of the class occurs in laboratory conditions, where the refrigerator is tested for a certain period with empty chambers at standard ambient temperatures. Based on the data obtained, the Energy Efficiency Index (EEI) is calculated, which determines the final letter on the sticker.
⚠️ Attention: The actual electricity consumption in your home may differ from that stated on the label. The final figure is influenced by the frequency of door opening, room temperature and the degree to which shelves are filled with products.
Understanding this system allows the consumer to make an informed choice. If you see two refrigerators with identical functionality, but one of them has a higher class, the choice is obvious from a long-term perspective. However, it is important to take into account the initial cost of the equipment.
Technical differences between class A and class B
The main technical difference lies in the amount of energy consumed relative to the conventional standard. Refrigerators of class A (and its subcategories A+, A++, A+++) consume significantly less electricity than their class counterparts B. If we talk as a percentage of the basic standard, then category B models consume from 55% to 75% of the conventional norm, while category A falls within the range of 44% to 55% (for old standards) or even lower for new ones.
The difference in numbers can be 20–30% and even more in favor of class A. This is achieved through the use of more advanced compressors, improved thermal insulation of the housing and optimized electronics operating algorithms. Class B models often use simpler insulation materials and standard motors, which require more energy to pump refrigerant through the system.
In addition, high-end energy efficiency refrigerators are often equipped with inverter compressors. They work smoothly, without constant switching on and off at full power, which results in savings. Class B models more often use traditional linear compressors operating on the “start-stop” principle, which is less efficient.
The influence of refrigerant on the class
The use of modern refrigerants, such as R600a (isobutane), allows you to achieve better energy efficiency indicators compared to outdated freons. However, the type of gas itself does not guarantee a high class; the overall engineering assembly of the system is important.
It is also worth noting the noise level. Often (though not always) more energy-efficient refrigerators are quieter, since their cooling systems are designed to minimize energy loss, which indirectly reduces acoustic noise.
Comparative table of characteristics
For clarity, let's look at the main parameters that distinguish these two categories. The data are averaged, since specific figures depend on the volume of the chambers and the manufacturer.
| Parameter | Class B | Class A (and higher) |
|---|---|---|
| Energy consumption | High (55-75% from the norm) | Low (less than 55% of the norm) |
| Compressor type | Often linear | Often inverter |
| Thermal insulation | Standard | Improved, multilayer |
| Purchase cost | Lower | Higher |
| Payback period | Not applicable | 3-5 years |
The table shows that the overpayment when purchasing a class A model is compensated during operation. However, if you plan to use the refrigerator in the country, where it will be turned on only occasionally, the economic meaning of the high class is lost.
It is also important to consider that with the transition to the new marking (A-G scale), the old classes A+, A++ and A+++ were redistributed. What was previously considered a top A+++ may be simply a C or D on the new scale, while the new A class has become exclusive to the most advanced technologies.
Economic benefits and payback period
Many buyers are wondering: is it worth overpaying for class A? Let's do the math. The average refrigerator consumes about 250–350 kWh per year. The difference between class B and class A++ can be about 100 kWh per year. At a tariff of, for example, 5 rubles per kWh, the savings will be 500 rubles per year. Over 10 years of service, you will save 5,000 rubles.
However, this is a very rough calculation. If electricity rates rise, which happens regularly, or if you have a large two-compressor Side-by-Side refrigerator, the difference in consumption can be much more significant - up to 200-300 kWh per year. In this case, the savings will become more noticeable.
On the other hand, class A refrigerators often cost 15–20% more than their class B counterparts. The payback period for this overpayment can take 5–7 years. If you buy equipment with the expectation of long service life (10+ years), then a high energy efficiency class is beneficial. If you take equipment temporarily or for a rented apartment, class B may be more rational in terms of initial investment.
⚠️ Attention: Electricity tariffs and the cost of household appliances change. Before purchasing, compare the price difference between models of different classes and the current tariff in your region to accurately calculate the payback.
Also, do not forget about liquidity. Selling a used refrigerator with a high energy efficiency class on the secondary market is usually easier and more expensive, since buyers pay attention to future costs.
How to find out the class of your refrigerator
Determining the energy class of your current device is quite simple. First of all, look at the sticker, which is usually stuck on the inside wall of the refrigerator compartment, on the door or on the back wall of the cabinet. The letter index will be indicated there.
If the sticker is worn off or missing, information can be found in the operating instructions (user manual) in the “Technical Specifications” section. Also, the data is often duplicated on the official websites of manufacturers in the product card if you know the exact model.
For older models released before the introduction of mandatory labeling, the class may not be explicitly indicated. In this case, you can focus on the year of manufacture:
- 📅 Models before 2003 most often belong to classes C, D or even E.
- 📅 Equipment produced in 2003–2010 usually corresponds to classes A or B.
- 📅 Modern models (after 2010) often have class A+ and higher.
Knowing the exact model also allows you to check for service bulletins that may affect energy consumption (for example, recommendations for replacing the seal to improve tightness).
Factors influencing actual consumption
Even the most efficient class A refrigerator can start to “eat” like a class C model if its operating conditions are violated. The first and most important factor is location. Installing the refrigerator next to a radiator, stove, or in direct sunlight forces the compressor to work almost without interruption.
The second factor is the condition of the sealing rubber bands. If the door does not close tightly, warm air gets in, the moisture condenses and turns into ice, and the motor tries to compensate for the loss of cold. Regular leak testing (test with a sheet of paper) is mandatory.
The third factor is the room temperature. Refrigerators are designed to operate in a specific climate class (SN, N, ST, T). If the room is +30°C, and the refrigerator is designed for a temperate climate, its efficiency decreases and consumption increases. Conversely, installation in an unheated garage in winter can lead to freezing of the oil in the compressor.
☑️ Checking operating conditions
User habit also affects consumption. Frequently opening the door, placing hot food inside, or storing liquids uncovered (which evaporate and create excess moisture) all add stress to the system.
Is it worth replacing your old refrigerator with a new one?
If your refrigerator is more than 15 years old, it is most likely a Class C or lower. Replacing such a giant with a modern A++ or A+++ class model can reduce energy consumption by 2–3 times. This not only saves money, but also contributes to the environment, since reducing the load on the electrical grid reduces CO2 emissions.
In addition, old refrigerators use refrigerants (freons), which are harmful to the ozone layer. Modern models use safe gases. However, when disposing of an old device, it is important to hand it over to a specialized collection point to avoid freon entering the atmosphere.
The decision to replace should be based on a comprehensive assessment: the technical condition of the old unit, the cost of repairs (if needed) and potential savings. Often, repairing an old compressor or replacing a thermostat in an ancient refrigerator is not economically feasible compared to purchasing a new, efficient model.
In conclusion, the difference between classes A and B is significant not only in numbers on paper, but also in real electricity bills. When choosing equipment, always look at the long term.
Does the volume of the refrigerator affect the energy consumption class?
Yes, directly. The energy efficiency class is calculated taking into account the useful volume. A large refrigerator needs more energy to cool, so the standards are higher. You need to compare models of similar volume and functionality.
Can the energy efficiency class change over time?
The class itself (as a characteristic of the model) does not change. However, wear of the compressor, contamination of the condenser or loss of tightness of the seals lead to the fact that real consumption increases, and in fact the refrigerator begins to work less efficiently than stated.
Is it true that No Frost refrigerators consume more?
This used to be the case. Modern No Frost systems with inverter compressors often have class A++ and higher, consuming no more, and sometimes less, than models with manual defrosting due to precise temperature control.
What to do if the label indicates class G?
According to the new labeling scale (EU 2021/341), class G means the least efficient. Most likely, this is either a very old device or a model with basic characteristics. Such refrigerators will consume the maximum amount of energy.
Does the class depend on the country of origin?
No, the class depends on the technologies used in a particular model. Chinese, Turkish or European factories can produce equipment of any class, if it meets the declared efficiency standards.