Comparison Liebherr CU 2311 white vs Liebherr CTP 2921 white

The total capacity of the refrigerator is the total capacity of all the main working chambers: refrigerating, freezing, zero, and wine chambers. The set of these chambers, of course, will be different in different models (see more about them above). Here we note that large volumes, on the one hand, simplify the storage of numerous products and, on the other hand, affect the dimensions and price of the unit. It is also worth considering that refrigerators of the same total capacity may differ in the capacity of individual chambers.

These features relate exclusively to the design and overall appearance of the refrigerator. These features include glass door panel, hidden door handles, handle illumination, customizable panels and retro design. Here is a detailed description of all these items:

— Glass door panel. Refrigerators with this feature have glass doors on the outside. This finish does not affect the functionality of the device but gives it a stylish appearance due to the specific glare on the glass surface. And in some models, a decorative pattern can also be applied to the glass. In addition, such a coating is very resistant to scratches. Its disadvantage is a rather high cost. So the glass door panel is typical mainly for “designer” refrigerators, created with an emphasis not only on functionality but also on the rich design.

— Hidden door handles. Handles made in the form of recesses on the ends of the refrigerator doors. They can be located on the top, bottom and/or side, depending on the design of a particular unit and the location of the door itself. Anyway, thanks to the hidden handles, the refrigerator at least acquires a neat, discreet appearance — with a minimum of unnecessary details on the doors. In addition, a regular handle can be touched by careless movement, but with a hidden one, it is impossi...ble. It is especially relevant in cramped conditions. On the other hand, not all users find hidden handles comfortable enough. Therefore refrigerators with doors of a more traditional design nowadays also continue to be produced.

— Handle illumination. This feature not only gives the refrigerator an interesting appearance but also makes it more visible in low-light conditions. The latter can be useful not only in the evening or at night but also at other times of the day — if the unit is installed in a place that is itself poorly lit. However, there are few models with illuminated handles on the market, and they mainly belong to the middle and premium class.

— Customizable panels. Replaceable panels that allow you to change the appearance of the refrigerator. This feature does not affect the functionality, but it makes it possible to optimally choose the design for the interior of the room and the tastes of the owner. Some units with this feature are initially supplied without decorative panels in the expectation that users themselves choose or order a pattern at their discretion. On the other hand, the real need to use customizable panels rarely arises — even for a non-standard interior, it is easier to choose a refrigerator that was originally made in a certain design. So there are very few models with this feature nowadays.

— Retro design. Refrigerators made in the style of "retro" — in other words, semi-antique. Typically, such models imitate the technique of the 50s — 60s of the twentieth century, with rounded body shapes, massive handles, etc. However, there are other design options — the old sideboard, or even completely non-standard, in the form of a car, aeroplane, etc. Anyway, completely modern technologies are usually hidden under such a case. And the original appearance can be very useful for an interior in an unusual style. On the other hand, it is worth considering that retro design is very expensive. Most of these models are designed for those for whom design is no less important than functionality.

The total capacity of the main working chamber of the refrigerator. If there are separate zero chambers, compartments for wine and other additional functions, this paragraph takes into account only the volume of the refrigerating chamber itself, without additional equipment. In the smallest modern units, this figure does not even reach 100 liters, in the largest it can exceed 400 liters.

The choice of capacity depends on the actual storage needs of the products. At the same time, both the volume of stocks and the frequency of their replenishment (every day, once a week, etc.) matter. The chamber should not be stocked completely; this adversely affects the quality of the refrigerator. On the other hand, it is worth remembering that large volumes accordingly affect the dimensions and price of the unit.

In general, for one or two people, a capacity of 200 – 250 liters, or even less, is considered quite sufficient. The optimal capacity for a family of three is about 250 – 300 liters, for four to five people — 300 – 350 liters, and larger volumes are really needed mainly for specific situations when food has to be stored in large quantities and for a long time.

The freezer, if present, may be positioned differently relative to the main compartment of the refrigerator. In classic units and French Door models (see "Product type"), the bottom location of the freezer is found predominantly (in some cases, such a freezer has a retractable design). The top location is noticeably less popular, although it is also used quite often. Side-by- side freezer models are almost all in the Side-by-Side category (see "Type"). And some modern refrigerators may not have a freezer at all. Here is a more detailed description of each option:

— Bottom. By installing the freezer at the bottom, you can raise the main (refrigerator) compartment to the optimum height: it will be in front of the user’s eyes, and you will not have to bend down to access the contents of this compartment. That is why this option is the most popular nowadays: most users often need access to the main volume of the refrigerator, and a freezer is required relatively rarely. Note that we are talking about classic freezers with doors; drawer freezers are placed in a separate category, described below.

— Bottom (retractable). Freezer with a bottom location, made in the form of a drawer. The general advantages of the bottom location are described above. And the retractable design provides added convenien...ce for the user, relieving him of the need to make unnecessary movements: to access the contents, it is enough to pull out the drawer without having to open the door first. On the other hand, such freezers are more demanding on the quality of thermal insulation, which affects the cost of the entire refrigerator. In addition, the pull-out chamber is one common container, without division into levels, while such chambers are rarely provided for more than two — this limits the possibility of separating different types of products into different compartments of the freezer.

— Top. The top position of the freezer makes it easy to access the contents without having to bend over. On the other hand, you will most likely have to bend over to access the main compartment. So this layout option is not as common as the bottom freezer installation and is mainly in two categories of refrigerators. The first is individual models of classic layout or French Door layout (see "product type"); many of them have a large overall height, which partly compensates for the features of the top location of the freezer. The second variety is compact units of small volume in which the freezer is installed inside the main compartment and does not have its outer door. In such cases, the top setting is considered optimal for several technical reasons.

— Side. The traditional option for Side-by-side units (see "Product type"), which is practically not found in other types of refrigerators. Note that the side freezer in such cases does not necessarily occupy the entire height of the refrigerator — it can be combined, for example, with a fresh zone or a wine chamber. In some models, freezers with this arrangement can even be equipped with separate doors. Although usually all compartments on one side of the unit are still covered by one common door.

— No freezer. By definition, single-chamber models do not have a freezer compartment (see "Number of chambers"); at the same time, in this category, there are both compact and rather large and roomy refrigerators. You can also find two-chamber units without a freezer on the market — in them the main compartment is usually complemented by a clearly defined fresh zone, but there is only one door, common to both compartments. Another type of unit with this feature is display refrigerators (see "Product type").

The capacity of the freezer installed in the refrigerator. Such a chamber is designed to store products at temperatures well below zero (on average -18 °C). Its capacity is related to the total capacity of the refrigerator (and the capacity of the main, refrigerating chamber). However, there is no strict dependence here — models with a similar volume of the refrigerating chamber can be equipped with freezers of different sizes.

When choosing by capacity, it is worth considering how much frozen food you plan to store at a time. Note that it is undesirable to fill the freezer completely — this negatively affects the efficiency of work. However, if this chamber is planned to be used only occasionally, and you do not plan to keep numerous products in it, you can not chase after the capacity: for such cases, 25 – 50 liters, or even smaller capacities, are enough. In the smallest modern refrigerators, the freezer capacity does not exceed 10 liters. And vice versa, very roomy freezers come across — for 176 – 200 liters and even more. Such volumes are typical mainly for side-by-side and French door units (see "Product type"). However, they are also found in models of the classic two-chamber layout.

The operating temperature of the refrigerator freezer.

The generally accepted standard for freezers is actually -18°C. It allows you to effectively store pre-frozen foods, as well as freeze them (with certain precautions). At the same time, for most modern refrigerators, lower temperatures are claimed — at -24 °C, and in some models even lower. However, such indicators are not always standard — in many units, they are achieved only in the fast freeze mode (see "Features"). This should be clarified separately. However, the temperature of the freezer below -18 °C means good freezing features.

In turn, chambers with more modest minimum temperatures — -12 °C, or even -6 °C — are only suitable for storing pre-frozen products; they are not suitable for freezing any significant amount of contents. However, there are very few refrigerators with such indicators on the market — mostly low-cost or outdated models.

To indicate the temperature of the freezer, markings in the form of asterisks (snowflakes) are often used, each of which means a decrease in temperature by 6 °C. For example, in models at -24 °C, you can find the designation * (***) — four asterisks, one of which is highlighted. This usually means that in the standard mode the freezer operates at -18 °C (three stars), and at another 6 °C (down to -24 °C) the temperature drops during fast freezing.

The autonomy time provided by the refrigerator when the power is turned off.

Often, this parameter describes the capabilities of the freezer. In such cases, the autonomy time is indicated as the time during which, at an outside temperature of +25 °C, the temperature in the filled freezer does not rise above -9 °C (this level is considered critical for the storage of frozen foods). Accordingly, the actual autonomy time may differ from the claimed one — depending on the ambient temperature, the frequency of opening the refrigerator, etc. However, this parameter describes the quality of thermal insulation quite accurately, and it is possible to evaluate different models and compare them with each other.

Also, autonomy time can be given for models without freezers: in such cases, we are talking about the time during which the temperature in the refrigerator compartment remains at an acceptable level under approximately the same conditions.

The average amount of energy consumed by a refrigerator in a year of operation. Of course, these figures are not absolutely accurate; the actual power consumption may vary depending on the specific operating conditions. However, this parameter makes it possible to evaluate the power consumption of the refrigerator and compare different models with each other. At the same time, it often turns out to be more convenient and visual than the energy consumption class (see above) because in this paragraph we are talking about a specific figure (from which you can also calculate the cost of electricity consumed). For clarity, let's take the following example: a small two-chamber refrigerator with energy class A can consume less energy per year than a large side-by-side unit of class A+++, although formally, in terms of energy consumption classes, the second model will be more economical than the first.

The climate class to which the refrigerator corresponds.

As the name implies, this parameter describes the environmental conditions for which the unit is designed. The warmer it is around — the more powerful the refrigerator should be and the better thermal insulation it should have. Specific classes are indicated by letters, here are the most popular options:

— SN (subnormal). Models for a temperate cool climate, have an operating range from +10 °C to + 32 °C. Such a unit can be useful in a poorly heated room where the temperature can drop below +16 °C — for example, on the veranda of a private house, in a garage, etc.

— N (normal). Refrigerators for temperate climates, with an operating temperature range of +16...+32 °C. Such a unit is suitable for most residential apartments and houses in mid-latitudes.

— ST (subtropical). Models for subtropical and humid tropical climates. Normally work at the range of external temperatures +18...+38 °C.

— T (tropical). Refrigerators for dry tropical climates. Designed for temperature range +18 °С to +43 °С.

There are many models on the market with an extended temperature range covering several classes. For example, a unit labelled N-ST will have a temperature range of +16...+38 °C. Such refrigerators are indispensable in complicated...climates, the conditions of which are not covered by one standard class — for example, during cold winters and hot summers.