Refrigerators with the system No Frost have become a standard in modern kitchens due to their ease of use and the absence of the need for manual defrosting. However, this technology has its own characteristics that directly affect the safety of products. The main difference is the constant circulation of dry air inside the chamber, which creates the risk of rapid dehydration of food.
Many users notice that products left open lose their presentation, dry out or become covered with an unpleasant crust within a day. This is due to the fact that forced ventilation actively blows moisture out of unprotected surfaces. That is why the correct selection of storage capacity becomes not just a matter of aesthetics, but a technical necessity.
In this article we will analyze in detail which materials are suitable for use in conditions of active airflow, and which can harm the products or the unit itself. You will learn why glass is preferable to plastic in some cases, and when it is better to use sealed trays.
Features of the microclimate in the No Frost system
The system No Frost works on the principle of removing moisture from the refrigeration chamber through special evaporators located behind the back wall. The fan constantly circulates cooled air throughout the entire volume, ensuring uniform temperature, but at the same time creating conditions of low humidity. Dry air is the enemy of most products if they are not protected by reliable packaging.
Unlike a drip system, where humidity is naturally maintained at a higher level, in No Frost an open plate of soup or a piece of cheese will turn into “dried fruit” in a very short time. The circulation of flows also contributes to the active transfer of odors between different shelves. Therefore tightness becomes a key requirement for any cookware.
It is important to understand that even a short-term opening of the door triggers a powerful air flow, which can move light packaging or upset the temperature balance in a local area. Using the right container helps minimize this effect and keeps microclimate stable.
⚠️ Attention: Never put hot or warm food in the refrigerator, even in a closed container. A sharp jump in temperature will cause the No Frost system to wear out, and condensation inside the container will spoil the product.
Plastic: advantages and limitations of containers
Plastic containers are the most popular choice for owners of No Frost refrigerators. Their main advantage is their lightness and variety of shapes. Food-grade plastic (PP, PE marking) is safe and can withstand low temperatures without cracking if accidentally dropped.
However, it is worth considering that thin plastic can transmit odors over time, even if the lid is closed tightly. In addition, some types of polymers tend to absorb fat and dyes from foods, becoming cloudy. For storing liquids and prepared foods, it is better to choose models with silicone seals lids that provide vacuum sealing.
An important aspect is the resistance of the material to washing. Cheap plastic quickly scratches, and bacteria begin to multiply in microcracks, which the air circulation will spread throughout the refrigerator. Therefore high-quality plastic with a smooth surface is preferable to cheap analogues.
When choosing, pay attention to the following characteristics:
- 🔒 The presence of a reliable mechanism for snapping the lid to protect against depressurization.
- 🌡️ Resistance to a temperature range from -20°C to +100°C (for washability).
- 📏 Compact and stackable (installed on top of each other) to save space.
Glass: hygiene and preservation of taste
Glass is considered the standard of hygiene and inertness. It does not absorb odors, fats or dyes at all, making it an ideal choice for storing strong-smelling foods or delicacies. Under conditions No Frost glass also acts as a barrier that prevents moisture from escaping from the product.
The main disadvantage of glass is its weight and fragility. Dropping a heavy glass container onto the refrigerator floor can damage plastic shelves or even the glass inserts if they are not tempered. However, modern manufacturers offer solutions made from borosilicate glass, which is much stronger than conventional glass.
Glass containers with bamboo or plastic lids often have imperfect sealing compared to purely plastic counterparts. If you choose glass, make sure that the lid is equipped with silicone gasket. This is critical to prevent dry air from getting inside.
Can glass be placed in a No Frost freezer?
Ordinary glass can burst from a sudden temperature change or expansion of the contents when freezing. Use only special tempered glass marked “Freezer safe” or leave free space for the expansion of the liquid.
Advantages of glassware:
- ✨ Completely inert material - no chemical reactions with food.
- 👁️ Transparency - the contents are immediately visible, no need to open cover.
- 🧼 Easy to care for and disinfect, can be washed in the dishwasher.
Vacuum bags and cling film
For products that do not require a rigid container shape, vacuum bags are excellent. Vacuum sealing removes air, preventing oxidation and drying out, which ideally compensates for the shortcomings of the No Frost system. Meat, fish and cheese are stored in a vacuum 3-4 times longer.
Cling film and foil are a more affordable, but less reliable alternative. The film often slips or breaks if handled carelessly, breaking the seal. Foil is good for protection from light and short-term storage, but it does not provide a tight fit to a product of complex shape.
The use of reusable silicone lids and elastic stretch films (eco-friendly option) is gaining popularity. They fit tightly around bowls and plates, creating the necessary moisture barrier. This is a great way to adapt existing dishes to the requirements of the refrigerator.
A comparison of different types of packaging is presented in the table below:
| Packaging type | Leak tightness | Odor protection | Durability |
|---|---|---|---|
| Plastic container | High | Good | 2-3 years |
| Glass with gasket | High | Excellent | 5+ years |
| Cling film | Low | Average | Disposable |
| Vacuum bag | Maximum | Maximum | Disposable |
Zoning: where and what to store
The location of products in the No Frost refrigerator directly depends on the direction of air flows. Typically, cold air is supplied through the back wall or top of the chamber. The lowest temperatures and the strongest airflow are observed at the back wall and on the top shelves.
It is not recommended to store foods that are sensitive to freezing or drying out here (for example, greens, some fruits, open sauces) unless they are packaged in sealed container. The refrigerator door is the zone with the highest temperature and its frequent changes, suitable only for drinks, sauces in original containers and eggs.
The lower shelves and drawers (freshness zone) often have a separate circulation system or high humidity. Here you can store vegetables and fruits without tight packaging, but it is better to use special perforated bags or containers with a humidity regulator. This will prevent rotting from condensation and drying out from air.
☑️ Check the packaging before installation
Zoning rules:
- ❄️ Back wall: ready-made dishes in glass/plastic, semi-finished products.
- 🥦 Boxes: vegetables, fruits, greens (in bags with holes).
- 🥛 Door: drinks, butter, hard cheeses (in original packaging).
What you absolutely cannot do
There are a number of common mistakes that negate all the advantages of the No Frost system. Firstly, you cannot store food in open metal containers (aluminum pots, bowls). The metal cools quickly and can cause local hypothermia neighboring products, as well as oxidation.
Secondly, it is prohibited to use cardboard boxes from food (egg trays, milk cartons) for long-term storage. Cardboard is a porous material that absorbs moisture from the air and odors, becoming a breeding ground for bacteria and mold. Transfer the eggs into special plastic containers.
Also, do not overcrowd the refrigerator. Air circulation is the basis of No Frost. If there are no gaps between the products, the cold is not distributed evenly, and temperature sensors may not work correctly, which will lead to spoilage of supplies.
⚠️ Attention: Never use containers from household chemicals or technical liquids for storage in the refrigerator, even thoroughly washed. Micropores of plastic can store chemical molecules, which are then transferred into products.
Container care and hygiene
Regular washing of containers is the key to freshness of products. With constant air circulation, the smell from a dirty lunch box will quickly spread to the entire contents of the refrigerator. It is recommended to wash plastic containers once a week with hot water and baking soda or a mild detergent.
Pay special attention sealing rubber bands to the lids. Food particles often get stuck in them and become moldy. Remove the rubber bands and wash them separately. Glass containers can be washed at higher temperatures, which provides better disinfection.
If you notice that the plastic has become cloudy, yellowed or covered with a network of small scratches, it is better to replace it. Such material no longer fulfills its protective function and can release harmful substances. Monitor the service life of your kitchen utensils.
How to remove odor from a plastic container?
Soak the container in a solution of water and vinegar (1:1) for several hours or put an activated carbon tablet inside for a day.
Questions and answers (FAQ)
Is it possible to store food in a regular bag in No Frost?
A regular plastic bag, simply tied in a knot, provides little protection. Pressurized dry air will still dry out the product. It is better to use zip-lock bags or special vacuum bags for maximum efficiency.
Why does bread dry in the No Frost refrigerator?
Bread has a porous structure and quickly releases moisture into the dry air. In the No Frost system this process occurs at an accelerated pace. Store bread in an airtight bread bin or thick plastic container to maintain its softness.
Is plastic harmful to health in the refrigerator?
High-quality food-grade plastic (PP, HDPE markings) is inert and safe at low temperatures. Only technical plastics or heating of such containers can pose a danger. It is safe in the cold refrigerator.
Do you need to cover the plate with soup?
Absolutely. An open plate will not only dry out overnight, but will also saturate the air with moisture, which will then settle as frost on the evaporator, causing the refrigerator to turn on the defrost mode more often. Use a lid or cling film.