Zero zone in the refrigerator: purpose, temperature and rules for storing food

Have you ever noticed a compartment in your refrigerator with a mark «0°C» or «BioFresh»? This is the zero zone - a special compartment that many users either ignore or use incorrectly. Meanwhile, this is where products stay fresh 2–3 times longer than on regular shelves. But how does it work, what temperatures are actually maintained there, and why does the meat not freeze in it and the salad not wither? Let's figure it out.

Zero zone is not a marketing ploy, but a real technological innovation that appeared in premium refrigerators back in the 90s, and is now found even in models in the mid-price segment. Its main task is to create conditions as close as possible to the natural cooling of products without freezing. But for this zone to work effectively, you need to understand its principles and nuances of operation.

What is a zero zone and how it works

The zero zone (aka "freshness zone", «BioFresh», «FreshZone» or «0°C Zone») is a separate compartment in the refrigerator where the temperature is maintained from data-i="54">. Unlike the main chamber (where it is usually +4...+6°C), here the products are not just cooled, but are in a state –1°C to +3°C. Unlike the main chamber (where it is usually +4...+6°C), here the products are not just cooled, but are in a state "pre-freezing" - when bacteria practically do not multiply, but the tissue structure is not destroyed.

Technically, this is achieved due to:

• 🔹 Separate cooling circuit —in some models (for example, Liebherr or Bosch Serie 8) the zero zone has its own evaporator and fan.
• 🔹 Precise humidity control —a level of 50–90% is maintained in the compartment (depending on the mode), which prevents products from drying out.
• 🔹 Isolation from the main chamber —a door or drawer with a seal minimizes heat transfer.

It is important to understand that the zero zone is not a freezer or an ordinary shelf. Ice does not form here, but the temperature does not rise to room temperature. This is an intermediate option, ideal for products that spoil the fastest: meat, fish, dairy products, herbs.

What temperature should be in the zero zone

The optimal range for the zero zone is from –1°C to +2°C. However, depending on the refrigerator model and mode, this indicator may vary. For example:

• 🥩 For meat and fish —ideal –1…0°C. At this temperature, proteins do not denature and fats do not oxidize.
• 🧀 For cheeses and sausages — +1…+2°C. This prevents drying out and preserves taste.
• 🥬 For vegetables and herbs — +2…+3°C at high humidity (up to 90%).

⚠️ Attention: If the zero zone in your refrigerator is not adjustable (for example, in budget models Indesit or Atlant), the temperature there can be fixed - about +2°C. In this case, store there only those products that do not require ultra-low temperatures (cheeses, sausages, some vegetables).

What products can and cannot be stored in the zero zone

Not all products tolerate the conditions of the zero zone equally well. Here's what you should put there:

• ✅ Fresh meat and poultry —in a vacuum package or airtight container (otherwise it will dry out).
• ✅ Fish and seafood —better without plastic film (it prevents air circulation).
• ✅ Dairy products - cheeses, cottage cheese, sour cream (but not milk - it will sour faster).
• ✅ Vegetables and herbs - parsley, dill, lettuce, broccoli (pre-washed and dried).
• ✅ Fruits - berries (strawberries, raspberries), grapes, apricots (but not bananas and citrus fruits).

And here’s what to store in the zero zone impossible:

• ❌ Bread and pastries —they will become too dry or moldy.
• ❌ Tropical fruits (bananas, pineapples, mangoes)—spoil at temperatures below +8°C.
• ❌ Canned food and sauces —an ordinary shelf is enough for them.
• ❌ Eggs —in the zero zone they can absorb foreign odors.
• ❌ Ice cream and semi-finished products —they need a freezer.

Why can’t you store milk in the zero zone?

At a temperature of about 0°C, milk separates faster and acquires a bitter taste due to fat oxidation. In addition, under such conditions, lactose crystallizes, which can change the consistency of the product.

How to use the zero zone correctly: step-by-step instructions

For the zero zone to work effectively, follow these rules:

1. Prepare the food. Rinse the meat and fish, dry with a paper towel and pack in parchment or special containers with ventilation. Do not wash vegetables and herbs in advance - moisture will speed up spoilage.
2. Distribute into compartments. In most refrigerators, the zero zone is divided into two drawers:
   • 🍖 «DrySafe» (low humidity) - for meat, fish, cheeses.
   • 🥬 «HydroSafe» (high humidity) - for vegetables and herbs.

Do not overload. There should be space between products for air circulation. The optimal load is no more than 2/3 of the volume.

Control the timing. Even in the zero zone, products are not stored forever. Use the timing table above.

⚠️ Attention: If in your refrigerator the zero zone is combined with the freezer (as in some models Samsung RB**), make sure that the products do not touch the back wall - it may be too cold there (up to -5°C) and they will freeze.

Zero zone vs regular shelf: which is better for storage

Let's compare how products behave in the zero zone and on a standard refrigerator shelf (+4...+6°C):

As can be seen from the table, the difference is colossal. But there are also nuances:

• 🔸 In the zero zone you cannot store food for a long time —the maximum period for meat and fish still does not exceed 10 days.
• 🔸 Some products (for example, tomatoes or cucumbers) in the zero zone lose their taste due to low temperature.
• 🔸 If you rarely open the refrigerator, the difference between the zero zone and a regular shelf will be less noticeable.

Common mistakes when using the zero zone

Many users make the same mistakes, due to which the zero zone works ineffectively:

1. Storing food in original packaging. Plastic bags from the supermarket are not intended for long-term storage. They interfere with air exchange, and meat or fish “suffocate.”
2. Ignoring modes humidity. If you put meat in the vegetable compartment (HydroSafe), it will be too moist and will spoil faster.
3. Overfilling the compartment. When products lie tightly, the cold is distributed unevenly, and somewhere the temperature can rise to +5°C.
4. Storing hot or warm products. This upsets the temperature balance and can lead to the formation of condensation.
5. Untimely cleaning. The zero zone requires regular cleaning (once every 2-3 weeks), otherwise bacteria multiply there.

⚠️ Attention: If an unpleasant odor appears in the zero zone, this is a sign that the products have been stored for too long or without proper packaging. In this case, rinse the compartment with a soda solution (1 tablespoon per 1 liter of water) and dry.

How to clean and maintain the zero zone

The zero zone, like any other compartment of the refrigerator, requires care. Here's how to properly clean it:

1. Unplug the refrigerator (or switch to defrost mode, if supported).
2. Take everything out products and temporarily place them in a cool place (for example, in a cooler bag).
3. Rinse the compartment warm water with a mild detergent (for example, "Sanita" or “White” diluted).
4. Wipe dry —moisture can cause ice or mold to form.
5. Check the seals —if they are damaged, the temperature in the area will be unstable.

⚠️ Attention: Do not use abrasive sponges or metal scrapers - they can damage the plastic and break the seal of the compartment. For stubborn stains, use baking soda or vinegar solution (1:1 with water).

Also pay attention to ventilation holes —they should not be clogged with dust or products. In some models (for example, Siemens iQ700), these holes are located at the back - they can be cleaned with a vacuum cleaner with a narrow nozzle.

FAQ: Answers to frequently asked questions about the zero zone

Is it possible to store frozen foods for defrosting in the zero zone?

Yes, but with reservations. The zero zone is suitable for slow and even defrosting meat or fish (10–12 hours before). However, do not put food there directly from the freezer - first let it “dead” at room temperature for 10-15 minutes to avoid temperature shock.

Why does ice form in the zero zone?

This can happen in several ways reasons:

• 🔹 Frequent opening of the door - warm air condenses and freezes.
• 🔹 Thermostat malfunction - temperature drops below -1°C.
• 🔹 Clogged drainage holes - no water drains and freezes.

If ice appears regularly, check the seals and call a technician.

Is it possible to turn off the zero zone if it is not needed?

In most refrigerators, the zero zone works permanently, but in some models (for example LG InstaView) it can be disabled through the menu. However, this is impractical - the compartment will still consume energy, just less efficiently. It is better to use it for storing cheeses, sausages or drinks.

Which refrigerators have the most effective zero zone?

According to test results from 2023–2026, the following brands and series have the best performance:

• 🥇 Liebherr BioFresh —the most stable temperature and humidity.
• 🥈 Bosch VitaFresh Pro - optimal price-quality ratio.
• 🥉 Samsung Twin Cooling Plus - good ventilation, but sensitive to overload.
• 4️⃣ Siemens iQ700 - quiet operation and advanced settings.

In the budget segment it is worth paying attention to Atlant XM 6025-031 i Indesit EF 18 —they have a simple but functional freshness zone.

What to do if the zero zone does not cool?

If the temperature in the compartment is above +3°C:

1. Check if the refrigerator is not overloaded.
2. Make sure the door closes tightly (the packaging may be in the way).
3. Clean the ventilation holes.
4. Try resetting the settings (unplug the refrigerator for 10 minutes).
5. If the problem persists, call a technician (the sensor or compressor may be malfunctioning).