The modern refrigeration equipment market offers customers many models with various characteristics, where the key parameter is often the total displacement. However, experienced housewives and professional cooks know that what is more important is not how much food fits into the chamber, but how exactly they are stored there. This is where the volume of the freshness zone special compartment created for storing products that require a special temperature regime comes to the fore.
Many consumers mistakenly believe that any drawer at the bottom of the refrigerator is a freshness zone, but this is not entirely true. The actual amount of this usable space may vary significantly depending on the model, manufacturer, and type of cooling system. Understanding the difference between the declared volume and the actual usable space will help you avoid disappointment when purchasing and distribute supplies correctly.
In this article we will look in detail at what this parameter consists of, why it is critical for the preservation of vitamins in meat and fish, and how manufacturers sometimes manipulate the numbers in the specifications. You will learn what you really should pay attention to when choosing a refrigerator with a zero zoneso that food remains fresh for as long as possible.
Definition and purpose of the freshness zone
The freshness zone, which is often called the “zero chamber” or bio-zone, represents is an insulated compartment inside the refrigeration unit. Its main task is to maintain a temperature close to 0°C and optimal humidity, which can significantly extend the shelf life of perishable products without freezing them. Unlike the main chamber, where the temperature fluctuates around +4..+5°C, here the processes of bacterial reproduction practically stop.
Volume of the freshness zone is not just the geometric space of a plastic container. This is a complex engineering area where air circulates in a special way. In some models, this volume is divided into two parts: “wet” for vegetables and fruits, and “dry” for meat, fish and cheeses. That is why the actual useful volume may be less than that declared by the manufacturer, if we take into account the need for proper air exchange between products.
It is worth noting that this compartment may be called differently in different brands. For example, y Liebherr is BioFresh, y LG is Fresh Balancer, and y Bosch is VitaFresh. Despite the marketing names, the physical meaning remains the same: creating conditions as close as possible to natural cold, but without the formation of ice inside the product structure.
⚠️ Attention: Do not confuse the freshness zone with the usual bottom drawer in older refrigerator models. In units without a special air flow control system, the bottom drawer may be even warmer than the top shelf due to convection, which will lead to meat spoilage in 1-2 days.
It is important to understand that the volume stated in the passport often includes the volume of drawers, but does not take into account the space required for proper circulation of cold air. If you fill such a compartment with products to capacity, temperature conditions it will be broken, and the freshness effect will disappear.
Differences between dry and wet storage zones
Upon closer examination, it becomes obvious that the concept of "zone volume" freshness" is often divided into two functional types, each of which requires its own conditions. The dry area is designed for storing high protein foods such as meat, fish, poultry and some cheeses. Here the humidity is maintained at about 50%, which prevents oxidation and loss of taste.
The wet zone, on the contrary, is created for vegetables, fruits, herbs and berries. The humidity level here reaches 90-95%, which prevents products from withering and losing turgor. Useful volume The humid zone is often equipped with special regulators that allow you to manually change the air flow to set ideal conditions for specific gifts of nature.
The separation of these zones is critical, since storage Vegetables next to meat can lead to oversaturation of meat with odors and accelerated spoilage. Modern models, such as Samsung RB or Electrolux, often offer a "Dual Cooling" system, where these volumes are completely isolated from each other by physical partitions and independent cooling circuits.
- 🥩 The dry zone is ideal for marinated meat, which is planned to be cooked in 2-3 days.
- 🥬 The wet zone keeps the salad crisp and the berries juicy for up to a week.
- 🧀 Hard cheeses are best stored in a dry zone to avoid mold.
- 🍓 Berries in the wet zone are not covered with a white coating and do not dry out.
Some manufacturers go further and introduce vacuum sealing inside the freshness zone boxes, pumping out air for even longer preservation. However, in such models actual volume for loading products can be reduced due to the thickness of the walls and pump mechanisms.
How volume is calculated and measured
The issue of measuring the volume of the freshness zone often causes confusion among buyers comparing different models. Manufacturers use a standard ISO 15502which involves measuring the internal space of the chamber, taking into account all protruding elements, shelves and drawers. However, the methodology may vary: some brands indicate the volume up to the handle of the drawer, others - including the space above it.
There is the concept of “nominal volume” and “useful volume”. Nominal is the theoretical capacity of an empty chamber. Useful volume is the space that can actually be used to place products, taking into account the necessary air circulation. The difference between them can reach 15-20%, which significantly affects the choice of model for a large family.
When estimating the volume, you should pay attention to the geometry of the drawers. Tall and narrow containers may have a large capacity according to documents, but be inconvenient for storing large pieces of meat or bulky vegetables such as cabbage or watermelon. Wide and flat boxes are often more practical, even if their declared volume is slightly smaller.
⚠️ Attention: Technical specifications in online stores may differ from actual data on the manufacturer’s website. Always check the current specifications in the official user manual (manual) before purchasing, as the contents of the boxes may vary from batch to batch.
The actual volume is also affected by the presence of additional functions, such as built-in ionizers, freshness lamps or antibacterial protection systems, which occupy a certain space inside the chamber.
Comparative table of zone volumes freshness
To better navigate the variety of offers, it is useful to consider average data for popular types of refrigerators. Of course, specific numbers depend on the model and year of manufacture, but the general trends can be clearly traced.
| Refrigerator type | Total volume (l) | Volume of freshness zone (l) | Share of freshness zone |
|---|---|---|---|
| Budget two-chamber | 250-300 | 10-15 | ~5% |
| Middle class (No Frost) | 320-380 | 25-35 | ~8-9% |
| Premium multi-zone | 400+ | 60-90 | ~15-20% |
| Side-by-Side | 550+ | 40-50 | ~7-8% |
As can be seen from the table, premium refrigerators offer a significantly larger relative volume of the freshness zone. This is explained by a more complex cold distribution system and the presence of several independent evaporators. In budget models, the freshness zone is often represented by one small drawer without precise humidity control.
When choosing, you should consider not only numbers, but also ergonomics. For example, in models Haier or Indesit drawers can be pulled out on telescopic guides, which makes it easier to access products in the depths, effectively increasing the useful use of volume.
The influence of the type of cooling on the usable space
The type of cooling system directly dictates how much space a zone will take up freshness and how it will be arranged. In refrigerators with a No Frost system (without frost), the freshness zone is usually made in the form of sealed boxes, since a constant flow of dry air quickly dries unprotected food. Here the volume is strictly limited by the dimensions of these containers.
In models with a drip system (Static), the freshness zone can be organized more simply - for example, a special shelf above the freezer, where the temperature is naturally lower. In such cases, the “volume” is more blurred, since it depends on the installation height of the shelf and the possibility of its adjustment.
Modern combined systems, such as Total No Frost with a separate circuit for the refrigerator compartment, allow you to create large-volume freshness zones with precise electronics. However, you have to pay for this with the thickness of the walls and the presence of additional fans, which “eat up” part of the internal space.
- ❄️ No Frost requires the mandatory placement of products in closed containers.
- 💧 The drip system allows you to store food more openly, but requires regular defrosting.
- 🌪️ Dynamic cooling evenly distributes the cold, increasing the effective volume of the zone.
Therefore, the useful volume here is dictated not only by physical dimensions, but also by the discipline of use.
Popular technologies for expanding the zone
Manufacturers are constantly competing in technologies that allow the most efficient use of internal volume. One of these innovations is a variable lighting system LG, which not only disinfects, but also allows you to visually assess the occupancy of the zone, optimizing the arrangement.
Another approach is modular systems, like Bosch, where the freshness zone can be transformed. You can remove one drawer and increase the height of the space to store tall bottles or large vegetables, essentially changing the configuration of the volume to suit current needs.
Vacuum technologies being introduced in the premium segment allow you to “compress” the space occupied by air, but the pumping mechanisms themselves take up space. However, for restaurants and large families this is a justifiable compromise, since the shelf life of meat increases by 3-4 times.
Do not forget about the “floating shelf” - a glass panel with a cutout that can be moved to place a tall pan, partially blocking the freshness zone, but keeping the lower drawer cool. This is flexible volume control.
Practical tips for filling
Correct use of the freshness zone volume is an art. Even the largest box will become useless if filled chaotically. The first rule is sorting: place meat and fish in a dry area (or in airtight containers), and vegetables and herbs in a wet area.
The second rule is not to pile up food. Cold air must circulate. If you cover all the holes in your vegetable drawer, they may start to rot even at low temperatures. Leave at least 20% of the volume free.
The third rule concerns packaging. It is better to store meat in its original vacuum packaging or transfer it to containers with a tight-fitting lid. This will prevent the mixing of odors and preserve the juiciness of the product.
⚠️ Attention: Never place hot or warm products in the freshness zone. This will lead to a sharp jump in temperature in the entire compartment, condensation and possible damage to the supplies already lying there. Allow food to cool to room temperature.
Check the contents of the freshness zone regularly. Even under ideal conditions, food does not last forever. Make room for new purchases to maintain the refrigerator's efficiency.
Frequently asked questions (FAQ)
Is it possible to freeze food in the freshness zone?
No, it is not. The temperature in the fresh zone is maintained around 0°C, which is not enough for freezing. Food will remain chilled but not frozen. For freezing, use a freezer where the temperature is -18°C or lower.
Why does condensation form in the freshness zone?
Condensation can appear when the door is frequently opened, warm food is stored, or the seal is faulty. This is also possible if you store very wet food in a dry area. Check the humidity regulator settings.
How often should you wash the drawers of the freshness zone?
It is recommended to carry out general cleaning of the drawers and shelves of the freshness zone once every 1-2 months. Use a mild soapy solution and warm water. Avoid abrasive products that can damage the plastic.
Does the fullness of the refrigerator affect the volume of the freshness zone?
The physical volume does not change, but the cooling efficiency depends on the fullness. A half-empty refrigerator works less efficiently, since there is nowhere for cold air to accumulate. It is optimal to fill the chamber by 70-80%.
Is it possible to store bread in the freshness zone?
Not recommended. Bread in conditions of high humidity and low temperature in the freshness zone will quickly become moldy or rubbery. For bread, it is better to use a bread box at room temperature or a freezer for long-term storage.