When choosing new appliances for the kitchen, the first thing the buyer pays attention to is the appearance and brand, but it is the physical parameters that often become the decisive factor in the final decision. What are refrigerators measured in?? The answer to this question is not as simple as it might seem at first glance, since we are talking about three different planes: linear dimensions, internal volume and energy consumption.
Errors in calculations when ordering equipment can cost you time, nerves and even money if the unit simply does not fit into the doorway or does not fit in niche. Therefore, it is important to understand the difference between centimeters of height and liters of usable space, and also know how to correctly read the data from the energy sticker.
In this article we will analyze all the units of measurement used by manufacturers, explain why the actual volume may differ from the declared one, and help you understand the technical characteristics so that your new refrigerator fits perfectly into the interior and needs families.
Linear dimensions: centimeters and millimeters of accuracy
The main unit of measurement for the dimensions of household appliances around the world are centimeters (cm) or millimeters (mm). It is these parameters that are critical for the initial assessment of whether the device will fit in the allotted place. The standard height of modern models varies from 85 cm (mini-bars) to 210 cm (tall two-chamber models).
When measuring the space for equipment, it is necessary to take into account not only the width and depth of the niche, but also the necessary technological gaps. Gaps needed for air circulation so that the compressor does not overheat, and also so that the doors can open to the desired angle without obstacles.
⚠️ Attention: Never plan to install end-to-end in width. Even if the width of the niche matches the width of the cabinet, keep in mind that door hinges may add a few centimeters when open, and the walls may have slight play.
The depth of the cabinet is another parameter that is often ignored. The standard depth is about 60 cm, but if you have a kitchen with a countertop depth of 60 cm, then the refrigerator will protrude forward, since the handle and the back wall (where the condenser is located) add volume.
Internal volume: liters and their distribution
If dimensions are measured in centimeters, then the capacity of the refrigeration chamber is usually measured in liters (l). This is the amount of space available to accommodate products. However, here lies the main marketing nuance: manufacturers indicate total volumewhich is the sum of the volumes of the refrigerator and freezer compartments.
It is important to distinguish between the total volume and the usable volume. The total value includes the space occupied by shelves, drawers, air circulation system and lamps. Useful volume is the actual space where you can put pots and bags of food. The difference between them can reach 10-15%.
Volume distribution also plays a role. In models with a system No Frost the volume may be slightly less due to the presence of an evaporator and fans, but the products do not become covered with frost. While in drip systems, useful space is used a little more efficiently due to the absence of bulky air ducts.
For a large family of 4-5 people, a volume of 350 liters is considered the minimum comfortable, while for one person or a couple compact models up to 250 liters are quite sufficient.
Energy efficiency: kilowatt-hours per year
The third important metric by which a refrigerator is evaluated is its “gluttony.” It is measured in kilowatt-hours (kWh) per year. This indicator is indicated on a colored energy sticker, which must be glued to the front panel of the device.
Modern standards require that equipment meet energy efficiency classes from A to G (in the new EU scale) or A+++ (in the old one). However, the class letter is only a relative value. Real consumption in kWh/year gives an accurate understanding of how much money you will give to the energy company.
Energy consumption is influenced by many factors: frequency of door opening, room temperature, number of loaded products and serviceability of seals. An old refrigerator with a broken seal can consume 2-3 times more electricity than stated in the passport.
How to convert kW into rubles?
Multiply the annual consumption (for example, 250 kWh) by the tariff of your region for 1 kWh. This will give an approximate amount of expenses per year.
When choosing between two models with the same price, but different energy efficiency classes, the overpayment for a more economical option often pays off in 3-4 years of operation.
Freezing and storage power
The technical characteristics of the freezer deserve special attention. There are two different units of measurement used here. The first is freezing power, which is measured in kilograms of products that the chamber can freeze in 24 hours (kg/day).
The second characteristic is the autonomous storage time. It is measured in hours and shows how long the temperature inside the chambers will remain safe for food in the event of a sudden power outage. This parameter directly depends on the quality of thermal insulation and the amount of refrigerant.
For families who prepare meat or berries during the season, high freezing power (from 10 kg/day) will be critically important. If you freeze 20 kg of meat in a chamber with a capacity of 4 kg/day, the process will last for 5 days, which can lead to spoilage of the product inside.
| Parameter | Unit of measurement | Average value | Value for large families |
|---|---|---|---|
| Freezing capacity | kg/day | 4-6 kg | 10-15 kg |
| Autonomous storage | hours | 8-12 hours | 18-25 hours |
| Noise level | dB (decibel) | 39-41 dB | up to 38 dB |
Pay attention to these numbers in the technical documentation, especially if you plan to place the refrigerator in a studio apartment or a combined kitchen-living room.
Noise level: decibels of silence
Although the refrigerator does not make loud sounds like construction equipment, it operates in a living room around the clock. Noise levels are measured in decibels (dB). Modern models are considered quiet if their value does not exceed 39-40 dB.
For comparison: a person’s whisper is about 30 dB, and a normal conversation is 60 dB. If the refrigerator emits 45 dB or more, its hum will be noticeable in the quiet of the night, which can irritate sensitive people. Inverter compressorsAs a rule, they operate quieter than usual, since they do not have sharp starting currents.
⚠️ Attention: The declared noise level is measured in laboratory conditions at a distance of 1 meter. In a small kitchen with tiled walls, sound may reflect and appear louder. When installing, be sure to check whether the housing is vibrating against the furniture.
In addition to the hum of the compressor, the source of noise may be the gurgling of refrigerant in the pipes or the operation of fans in the systems No Frost. Before purchasing, it is advisable to read reviews about a specific model, since everyone’s subjective perception of noise is different.
Climate class and operating conditions
Another parameter that is often overlooked is the climate class. It indicates at what ambient temperature the refrigerator can operate effectively. Indicated by Latin letters: SN (subnormal), N (normal), ST (subtropical), T (tropical).
If you plan to install a refrigerator in an unheated country house or garage, the usual class N (from +16 to +32 °C) will not work. At temperatures below +10 °C, the oil in the compressor thickens, and it may fail when trying to start, and the thermostat simply will not give the command to turn on.
☑️ Check before purchasing
For unheated rooms, there are special models with an extended climate class (SN-T), which are capable of operating at temperatures from +10 to +43 °C. Using conventional equipment in unsuitable conditions will void the warranty.
Frequently asked questions (FAQ)
Why is the actual volume of the refrigerator less than what is written in the passport?
The passport indicates the full geometric volume of the empty chamber. The actual usable volume is smaller, since part of the space is occupied by shelves, drawers, air ducts of the cooling system, lamps and the thickness of the wall insulation.
How to convert kilowatt-hours into money?
To do this, you need to take the value of annual consumption (for example, 300 kWh) and multiply it by the tariff of your region for 1 kWh of electricity. The amount received is the approximate cost of operating the refrigerator for the year.
Is it possible to place the refrigerator next to the battery?
It is strictly not recommended. The proximity (of heat sources) causes the compressor to work non-stop, trying to compensate for the heat. This leads to a sharp increase in electricity consumption and rapid wear of the motor.
What does the A+++ marking mean?
This is a designation of the energy efficiency class on the old European scale, meaning the highest efficiency. From 2021, a new scale from A to G is being introduced, where A+++ corresponds approximately to class C or D of the new labeling, which often causes confusion among buyers.