When choosing new household appliances, you can often see colored stripes with the letters A to G on the price tag. Many buyers perceive this parameter as secondary, believing that the difference in energy consumption between models is negligible. However, refrigerator energy consumption class is one of the key indicators that directly affects the amount in monthly utility bills in the long term.
The refrigerator is the only appliance in the kitchen that works around the clock, 365 days a year, without turning off for a minute. Even a slight decrease in compressor efficiency or deterioration in thermal insulation over time results in significant overpayments. Understanding how equipment is marked and what is hidden behind the Latin letters will allow you not only to save your family budget, but also to contribute to the conservation of natural resources.
In this article we will analyze in detail where these classes come from, why they change, how to read the technical sticker correctly and whether it is worth overpaying for the highest energy efficiency when buying a new unit. We will also touch on the topic of how the age of a refrigerator affects its “gluttony.”
What is an energy efficiency class and where does it come from
An energy efficiency class is a standardized indicator designed to allow the consumer to quickly assess the efficiency of an appliance. In Europe and the EAEU countries there is a unified labeling system, which is based on Energy Efficiency Index (EEI). This index is calculated as the ratio of the actual annual electricity consumption of a given model to the average standard value for refrigerators of the same size and type.
Historically, there were initially only classes from A to G, where A was the most economical. However, technology developed rapidly, and manufacturers learned to make refrigerators that consumed significantly less than the old “A” standard required. As a result, models labeled A+, A++ and even A+++ appeared on store shelves, which confused buyers.
⚠️ Attention: From March 1, 2021, a new scale was introduced in the European Union and gradually in other regions, where only letters from A to G are again used. The old designations A+, A++, A+++ have been abolished. Now it is incredibly difficult to obtain class “A” - while such models are rare experimental samples.
The new scale was introduced in order to “stretch” the range and give space for further development of technology. Now class G means that the device consumes a lot of energy, and class A means that this is the pinnacle of engineering with minimal consumption. Most modern high-quality refrigerators are now in the range of classes C and D on the new scale, which corresponds to the old A++ and A+++.
The calculation of the index takes into account not only the power of the compressor, but also the volume of the refrigerating and freezing chambers, the presence of the system No Frost, climate class and even the temperature conditions at which tests are carried out. That is why two refrigerators of the same volume can have different classes if one of them is equipped with an inverter motor, and the other with a conventional one.
Deciphering the letter designations: from A to G
It is important to understand the current markings so as not to overpay for “pseudo-efficiency”. Let's look at what each letter means in the current scale. It is important to understand that the boundaries between classes are determined by the percentage of consumption relative to the standard.
Class A i B at the moment is a theoretical ideal or ultra-expensive models using advanced vacuum insulation technologies and sophisticated electronics. The purchase of such a refrigerator is justified only if you plan to use it for decades and are willing to pay three to four times the average price for it.
Classes C i D are the “golden mean” of the modern market. This is where 80% of high-quality models from well-known brands like Liebherr, Bosch, Electrolux and Indesitend up. They provide an excellent balance between purchase price and cost of ownership. The difference in consumption between class C and D may be noticeable, but it is not critical for domestic use.
Classes E, F and G occupy the niche of budget equipment or old models that are still sold in warehouses. Also in the lower categories are often large-volume refrigerators, built-in models with thick walls (to fit into the standard furniture) or devices with outdated compressors.
How to calculate the impact of the class on electricity bills
Many buyers are wondering: does it make sense to overpay 10-15 thousand rubles for a model of a higher class? To answer it, you need to carry out simple mathematical calculations. Electricity consumption is indicated in the technical data sheet and on the energy efficiency sticker in kilowatt-hours per year (kWh/year).
Let's imagine that you have two options: a class D refrigerator with a consumption of 250 kWh/year and a class C refrigerator with a consumption of 210 kWh/year. The difference is 40 kWh per year. If you multiply this by the tariff (conventionally 5 rubles per kWh), the savings will be 200 rubles per year. It seems that this is not much, but over 10 years of service the amount will accumulate significantly, especially taking into account the constant increase in electricity tariffs.
However, there is a nuance: real consumption always differs from laboratory consumption. In the laboratory, the refrigerator is in an empty room at a temperature of +25°C, it is not opened, and the food inside is at room temperature. In real life, you open the door dozens of times a day, load hot pots or warm food, which makes the compressor work harder.
It is also worth considering that inverter compressorswhich are often found in high-end models, work differently. They do not turn off completely, but only reduce the speed, maintaining the temperature. This allows you to avoid starting currents, which “eat up” the most energy every time a conventional motor is turned on.
| Class | Index (EEI) | Approximate consumption (250 l) | Economy vs class G |
|---|---|---|---|
| A | < 10 | ~100 kWh/year | ~70% |
| C | 20 - 30 | ~180 kWh/year | ~50% |
| E | 50 - 60 | ~280 kWh/year | ~25% |
| G | > 100 | ~400+ kWh/year | Basic |
The table shows that the difference between the extreme values is colossal. Buying a refrigerator class G instead of C in the long term can “eat up” the cost of the appliance itself over 15-20 years of operation only due to the difference in electricity bills.
Factors that reduce the energy efficiency of a refrigerator
Even if you bought a top-class refrigerator energy consumption, improper operation can reduce all its advantages to zero. There are a number of factors that cause equipment to wear out and consume more electricity than stated by the manufacturer.
The first and most important factor is the location of the refrigerator. If you place it close to a heating radiator, in direct sunlight, or in a niche without gaps for ventilation, heat transfer will be disrupted. The compressor will have to work almost without interruption to compensate for external heating.
The second factor is the condition of the door seals. Over time, the elastic bands dry out, crack, or simply no longer fit tightly. Warm air penetrates through the resulting cracks, humidity rises, ice forms, and temperature sensors command the motor to turn on more often.
The third factor is loading. An empty refrigerator and a completely stocked refrigerator work differently. The warm mass of food requires energy for cooling, but then it itself becomes a “cold accumulator”, helping to maintain the temperature during rare switching ons. However, if you overcrowd the refrigerator, preventing air circulation between the shelves, efficiency will decrease.
⚠️ Attention: Never put hot or warm food in the refrigerator. This not only violates sanitary storage standards, but also causes a sharp jump in electricity consumption, since the system has to pump out a huge amount of heat from the chamber.
The frequency of defrosting also affects energy consumption. A thick layer of ice on the evaporator (in models with a drip system) acts as a heat insulator, preventing cold from penetrating into the chamber. The compressor is forced to work longer to cool the air, which leads to excessive consumption.
Technology comparison: Inverter vs. Conventional compressor
When it comes to energy efficiency, the type of motor cannot be ignored. Traditional linear compressors work on the principle of “turned on - cooled - turned off”. This creates cyclic loads on the network and causes inrush currents, which consume a lot of energy. In addition, the temperature in the chamber fluctuates in the range of 2-3 degrees.
Inverter motors, which are increasingly found in classes A, B and C, work differently. They turn on once at startup, and then simply change the rotation speed, maintaining the set temperature. This allows you to achieve accuracy of up to 0.1 degrees and significantly save resource and electricity.
- 🔹 Noise: Inverter refrigerators operate much quieter, since they do not need to constantly start at full power.
- 🔹 Durability: The absence of constant starts and stops reduces wear on the mechanical parts of the engine.
- 🔹 Price: Models with an inverter are more expensive, but the difference in price pays off in 3-5 years of active use.
It is worth noting that not all inverters are the same. There are digital inverters (for example, Digital Inverter from Samsung or Linear Inverter from LG), which are considered more advanced and quieter. When choosing, pay attention not just to the word “inverter”, but to the specific technology of the manufacturer.
How the age of a refrigerator affects its class
Many users are surprised why an old refrigerator, which is 15-20 years old, “eats” as much electricity as two new ones. The fact is that energy efficiency standards are constantly becoming stricter. What was considered the norm 20 years ago (consumption of 400-500 kWh/year), today corresponds to the lowest class G.
Over time, technical characteristics deteriorate: thermal insulation becomes thinner, the compressor loses power due to wear, microscopic leaks or blockages may appear in the refrigerant circulation system. All this leads to the fact that the actual energy consumption class of the old unit drops.
If your refrigerator is more than 10 years old, and it belongs to class D or lower by modern standards (and then it could be “economical”), it makes sense to think about a replacement. A new device of class C or B will pay for itself due to energy savings and the absence of costs for frequent repairs.
In addition, older models often use refrigerants (freons), which are prohibited or limited for use due to harm to the ozone layer. Modern gases (R600a - isobutane) are not only more environmentally friendly, but also allow you to create more efficient cooling systems with lower pressure in the system.
Checklist: How to choose an economical refrigerator
When choosing in a store, do not rely only on the words of a consultant. Use this algorithm of actions to be sure to buy equipment that will not ruin you with electricity bills.
First of all, find a sticker with colored stripes on the case or in the instructions. Make sure you are looking at the current scale (A-G) and not the old one (A+++). If only the old scale is indicated, it means that the model was developed a long time ago, and its effectiveness may be lower.
Pay attention to the volume. Buying a huge 400-liter refrigerator for a single person is uneconomical. Empty space also needs to be cooled. It is better to choose a smaller, but higher-class model than a giant “cabinet” with a low rating.
⚠️ Attention: Additional features such as a display on the door, a built-in TV, a Wi-Fi module or a “freshness” zone with separate cooling always increase energy consumption. Consider whether you really need them.
Also check the climate class with the conditions in your kitchen. If the refrigerator is designed for a moderate climate (SN, N), and it is located in a hot kitchen without air conditioning, it will work at its maximum capacity, consuming maximum energy. For hot rooms, tropical class models (T, ST) are needed.
Is it true that class A+ refrigerator is colder than class G?
No, this is a common misconception. The energy consumption class only tells how much electricity the device spends to maintain the set temperature, and not how much it freezes. Both class A and class G are required to provide standard temperature conditions (for example, +5°C in the refrigerator and -18°C in the freezer). The only difference is the price you pay to achieve this cold.
Is it possible to increase the energy efficiency class of an old refrigerator?
It is impossible to radically change the class (for example, from E to C), since this is a characteristic of the design, insulation and motor. However, you can improve actual consumption: replace the door seals, wash the condenser from behind from dust, install the refrigerator away from it and defrost it in time. This will reduce consumption, but will not change the letter in the passport.
Does the color of the refrigerator affect energy consumption?
Technically, no, if the refrigerator is in the shade. However, if the unit is located in the kitchen with a window on the sunny side, then the dark body (black, dark blue) will heat up more from the sun's rays than white or metal. This will make the compressor work harder. Therefore, for sunny kitchens it is better to choose light colors.
Is it worth buying a refrigerator with two compressors to save money?
Two compressors (separately for the refrigerator and freezer compartments) are often found in premium models. They allow you to turn off one compartment (for example, a freezer) while on vacation, saving energy. In addition, each motor operates in its own mode, which can be more effective than one powerful one. But for a small family, one modern inverter compressor is often more economical than two old ones.