When choosing new household appliances for the kitchen, one of the first parameters that the buyer pays attention to is capacity. Many people mistakenly believe that the volume in liters declared by the manufacturer fully corresponds to the number of products that can be placed inside the chambers. However, the real picture often differs from expectations, which leads to inconvenience in operation. Understanding the difference between volume allows you to avoid purchasing a unit that is too bulky or, conversely, not spacious enough. In this article, we will analyze in detail how manufacturers carry out measurements, why the numbers in the device passport may not coincide with your visual perception of space, and what nuances you should pay attention to when studying the technical characteristics.
Understanding the difference between general And useful volume allows you to avoid purchasing a unit that is too bulky or, conversely, not spacious enough. In this article, we will analyze in detail how manufacturers take measurements, why the numbers in the device’s passport may not coincide with your visual perception of space, and what nuances you should pay attention to when studying the technical characteristics.
You need to take into account not only the dimensions of the case, but also the internal architecture of shelves and drawers and air circulation systems. A competent approach to estimating displacement will help optimize product storage and reduce energy costs.
The difference between total and useful volume
Manufacturers of household appliances use standardized measurement methods to indicate capacity in catalogs. Total volume is the geometric space inside the case, limited by the internal walls, excluding protruding elements, shelves, drawers and cooling systems. In fact, this is the volume of an empty box if all the insides were removed from it.
In contrast, usable volume is the actual space available to accommodate products. This figure is always less than the total, since it takes into account the thickness of the insulating materials, the design of the door shelves, the height of the freezer drawers and the presence of type systems that require additional space for air circulation. The difference between these indicators can be from 15 to 30 liters or more, depending on the model. No Frostthat require additional space for air circulation. The difference between these figures can be from 15 to 30 liters or more, depending on the model.
When choosing a model, it is important to focus on the usable volume if you plan to store a large amount of food. Some brands, for marketing purposes, highlight the total displacement in large font, while the actual working space turns out to be more modest.
⚠️ Attention: When comparing models from different brands, always check exactly what volume is indicated in the specifications. If the data is not divided into categories, most likely the total volume is indicated, which does not reflect the actual capacity.
It is also worth considering that the shape of the internal space affects ease of use. A tall, narrow refrigerator with a large capacity may be less convenient for storing wide pots or baking sheets than a shorter, but wider model with a similar capacity.
How manufacturers measure the capacity of chambers
To ensure uniform standards for assessing the capacity of household appliances in Europe and many other countries, the standard EN 16825 (formerly known as EN 15502) is used. This standard regulates the methodology for measuring the volume of refrigerators and freezers using special test blocks.
The measurement process is as follows:
- 📦 The chambers are filled with standard blocks-dummy products measuring 100×100×50 mm.
- ❄️ The space occupied by the cooling system, compressor (if it protrudes inward) and evaporator is taken into account.
- 🚫 From the total volume, zones where it is impossible to place products due to design features are subtracted (for example, the blowing zone in No Frost).
- 📏 The result is rounded down to whole liters.
It is important to note that the freezer compartment often has a smaller usable volume compared to the refrigerator due to thicker insulation walls. This is necessary to maintain low temperatures and save energy. Therefore, a two-chamber refrigerator with a total volume of 300 liters may have a freezer of only 60-70 liters.
Some manufacturers may use their own methods or indicate the volume without taking into account some internal ones. elements, which makes direct comparison of models of different brands difficult. Always study detailed specifications or consult with the seller about the actual capacity of the boxes.
Why is there less space in the freezer?
The thickness of the walls of the freezer compartment is always greater than that of the refrigerator compartment. This is due to the need to maintain a temperature of -18 ° C and below, minimizing. heat loss. A thicker layer of insulation “eats” the internal space, making the freezer visually smaller with the same external dimensions of the case.
The influence of the type of cooling system on capacity
The type of defrosting system directly affects the usable volume of the refrigerator Traditional models with drip system (Direct Cool) usually offer more usable space. with the same external dimensions. In them, the evaporator is located on the rear wall, and free air circulation does not require complex channels and fans.
Models with the system No Frost (or Frost Free) require the installation of additional components: fans, defrost heaters and systems air ducts. All these elements take up space inside the housing. In addition, for effective circulation of cold air, there must be gaps between the products and the walls, which also reduces the effective capacity.
Comparison of the effect of the cooling system on the volume:
| Parameter | Drip system | System No Frost |
|---|---|---|
| Usable volume | Maximum (up to 95% of the total) | Average (about 80-85% of the total) |
| Wall thickness | Standard | Often increased for fan noise insulation |
| Arrangement of elements | The evaporator is hidden behind the panel | Fans and ducts take up space |
| Requirements for installation | Can be filled tightly | Gaps are needed for airflow |
Despite the loss of some volume, many users choose No Frost for ease of use and the absence of the need for manual defrosting. However, if each shelf is critical for you, it is worth considering the classic ones. models or hybrid systems (Low Frost), which occupy an intermediate position.
Dependence of volume on dimensions and dimensions. layout
The external dimensions of the refrigerator are not always directly proportional to its internal volume. The layout of the internal units, the thickness of the housing and the location of the compressor play a key role. For example, built-in models often have a smaller usable volume compared to free-standing counterparts of the same height due to the need to install decorative panels and reinforced insulation.
Height. devices are one of the main factors in increasing capacity. Standard two-meter refrigerators hold much more than models with a height of 140-160 cm. However, width and depth are also important: narrow models (45-50 cm wide) are popular for small kitchens, but their volume rarely exceeds 250-280 liters.
When planning placement, consider the following aspects:
- 📏 Depth: The standard depth of 60 cm allows you to place large baking sheets. Models with a depth of 50-55 cm may not accommodate standard dishes across.
- 🚪 Swing of doors: Make sure that when opening the door they do not block the passage and allow the drawers to be pulled out to their full depth.
- 🏠 Embedding: For a niche of a standard size (height 200+ cm), the volume of the built-in refrigerator will be less than the external one due to the thickness of the walls of the furniture body.
There is a pattern: the more modern and energy efficient the model, the thinner it can be be walls while maintaining insulating properties, which allows you to increase the useful volume without changing the external dimensions. The use of vacuum insulating panels (VIP) in premium models allows you to gain several liters of internal space.
Optimal volume for a family: calculations and recommendations
Choosing the right refrigerator size directly affects your living comfort and budget. A unit that is too large will consume extra electricity and take up space in the kitchen, while a unit that is too small will force you to run to the store frequently. There is a simplified calculation formula: for one person it is recommended about 50-70 liters of useful volume of the refrigerator and 15-20 liters of the freezer.
Let's consider the approximate needs depending on the composition of the family:
- 👤 One person: A fairly compact model with a volume of 150-200 liters. Often these are refrigerators without a freezer or with a small freezer.
- 👨👩👧 Family of 2-3 people: The best choice would be a model with a volume of 250-350 liters. This will allow you to make supplies for the week and store a variety of products.
- 👨👩👧👦 Family of 4+ people: You will need a full-size refrigerator with a capacity of 350 liters or more, preferably with a large freezer or a separate freezer.
It is also worth considering your eating habits. If you prefer to cook at home and buy food in bulk for the week, feel free to add 20-30% to the calculated volume. Lovers of semi-finished products and frozen berries/vegetables need a larger supply in the freezer.
⚠️ Attention: Do not fill the refrigerator with food more than 70-80%. For proper operation of the cooling system and uniform temperature distribution, free air flow is necessary. A crowded refrigerator works less efficiently and consumes more energy.
Do not forget about seasonality. Before the holidays, the amount of space required increases dramatically. If you like to stock up for the winter, having an additional freezer or chest can be an excellent solution so as not to sacrifice the volume of the main refrigerator.
☑️ Checklist before purchasing
Energy efficiency and volume: is there a connection?
Many consumers are wondering: does the displacement of a refrigerator affect electricity consumption? The answer is clear: yes, it does.. More volume means more space that needs to be cooled and kept at a low temperature. Consequently, the compressor has to work harder or longer, especially if the refrigerator is often opened.
However, modern technologies make it possible to minimize this difference. Large volume class A++ or A+++ models can consume the same or even less energy than older small refrigerators of the C or Dclass. The key factors here are the quality of the compressor, the thickness and type of insulation, as well as the accuracy of the electronics.
It is important to understand the difference between absolute consumption and specific consumption. A large refrigerator uses more kilowatt-hours per year, but per liter of capacity it can use less energy than a small one if it is properly loaded. An empty large refrigerator will consume energy inefficiently.
When choosing, pay attention to. It contains information not only about the class, but also about the annual energy consumption in kWh. When comparing models of different sizes, use this indicator to objectively assess efficiency.
The myth of a small refrigerator
There is an opinion that a small refrigerator is always more economical. This is wrong. Old Soviet or early imported “babies” can “eat” more electricity than a modern two-meter giant, thanks to outdated refrigerants and poor insulation.
Frequently asked questions (FAQ)
Why is the actual volume less than what is written in the passport?
The passport often indicates the general geometric volume calculated from the internal dimensions of the case. The actual useful volume is less due to the presence of shelves, drawers, lighting systems, air ducts and air circulation requirements that “eat up” the space.
What volume of a refrigerator is considered standard for a kitchen in a Khrushchev-era building?
For small-sized kitchens, narrow models with a width of 45-50 cm and a height of up to 150 cm. Their volume is usually 200-240 liters. This is a compromise between capacity and space taken up.
Does the color of the refrigerator affect its internal volume?
No, the color of the exterior does not affect the internal volume in any way. However, the thickness of the metal sheet of the case may vary slightly depending on the model, but this is the exception rather than the rule, and does not affect the displacement.
Is it possible to increase the usable volume by removing the shelves?
Theoretically, yes, if you remove glass shelves and plastic containers, space will be freed up. But in practice, this will disrupt the zoning and air circulation system (in No Frost), which will lead to food spoilage. Manufacturers do not recommend operating a refrigerator without standard elements.
What is a freshness zone and how much space does it take up?
The freshness zone (Zero Zone, Fresh Box) is a special compartment with a temperature of about 0°C and high humidity. It takes up from 5 to 15 liters of volume depending on the model, but is critical for storing meat, fish and vegetables without freezing.