A refrigerator is the only appliance in an apartment that works around the clock without breaks, and that is why a mistake in choosing one costs not once, but every month for years. Let’s look at the characteristics that really affect the result, and separately at what has become important specifically in our conditions.

Volume and Layout

The guideline for volume is simple. For one or two people, approximately two hundred liters is usually enough, while for a family of three or four people, a comfortable range is from three hundred to four hundred.

As for the arrangement of compartments, the most practical option for most people is a two-compartment model with a bottom freezer, since the refrigerator compartment is used much more often, and it is more convenient to have it at eye level. Before buying, be sure to measure the installation space, including the space for opening the doors and the ventilation gap at the back, since this is where people most often make mistakes.

Compressor Type

A conventional compressor works on the principle of switching on and off, that is, it starts at full power, cools the compartment to the set temperature, and switches off until the next cycle.

An inverter compressor works continuously at variable speeds, adjusting its power to the current demand, which makes it quieter, more economical, and less subject to wear. Manufacturers provide a warranty of ten, and sometimes even twenty years, for inverter compressors, which in itself speaks about the difference in service life. And here is a separate reason that concerns us specifically. An inverter compressor creates smaller peak currents when starting, and therefore it is gentler on a power grid with voltage fluctuations, and it is easier to power from a backup source. The difference in price pays for itself over the service life, so for a refrigerator that is bought for ten years, the inverter option is almost always justified.

No Frost or Drip System

Both systems are modern, and the choice between them is a matter of priorities rather than quality. The drip system works so that moisture condenses and freezes on the back wall, and after the compressor switches off, it thaws and flows into a special container, from where it evaporates. Humidity inside remains high, food dries out less, and the refrigerator itself is cheaper, quieter, and usually consumes less. The disadvantage is the need for periodic defrosting. The dry-freezing system works through the circulation of cold air, which means ice does not form at all, the temperature is distributed more evenly, and there is nothing to defrost. The disadvantages are a higher price, more noise from the fan, somewhat less usable volume, and the fact that food dries out faster when left uncovered. The practical conclusion is this. For the freezer, dry freezing is more convenient because there is no frost formation. For the refrigerator compartment, the difference is insignificant for most people, and a drip system is completely acceptable.

Energy Efficiency Class

Since the appliance works continuously, this characteristic noticeably affects the bill. The labeling scale has changed, so old markings with several pluses and new letters cannot be directly compared with each other, and when choosing, it is worth looking at the specific consumption in kilowatt-hours per year, which is indicated on the label. This figure allows you to calculate the cost of operation using the formula that I analyzed in the material about electricity consumption.

Climate Class

A characteristic that almost nobody thinks about, although it concerns the actual conditions in the kitchen.

The class indicates the temperature range in which the appliance works normally, and a common class can withstand approximately up to thirty-eight degrees, while a tropical class is designed for approximately up to forty-three. This matters for a kitchen without air conditioning, since in hot weather the compressor works more intensively, which increases bills, noise, and wear.

What Really Affects Consumption

Here it is useful to understand that the rated power of the compressor does not equal actual consumption, since it works in cycles rather than continuously. Actual consumption is primarily affected by operating conditions. Placement near a stove, heating radiator, or window on the sunny side makes the compressor work noticeably more intensively. Frequent opening of the doors, especially in summer, costs more than it seems. An overfilled compartment without space for air circulation worsens cooling. An excessively low set temperature is a common mistake, since approximately four degrees is enough for the refrigerator compartment, and minus eighteen for the freezer, and every additional degree lower costs energy without any benefit. Worn door seals let cold air out, and the system compensates for this with additional operation. You can check them using the same sheet-of-paper test that I described for windows.

Behavior During Power Outages

How long the cold lasts. A closed refrigerator maintains an acceptable temperature for approximately four hours, while the freezer lasts significantly longer, approximately a day or more, if it is completely full and the door is not opened.

The main rule is not to open the door. Every opening costs hours of food preservation, and this is the most effective action of all possible ones.

A full freezer holds the cold better than a half-empty one, since frozen food works as cold accumulators. If there is a lot of space, it can be filled with bottles of water.

Powering from a power station is possible, but requires calculation. A refrigerator consumes approximately one hundred and fifty to two hundred watts while operating, but at the moment the compressor starts, the peak reaches four hundred to six hundred. The station must withstand exactly the peak value, otherwise it will simply switch off at the very first start. An inverter compressor is again at an advantage here, since its starting current is lower. In addition, the refrigerator needs a pure sine wave, and I wrote separately about choosing a station.

After power is restored, do not switch on all appliances at the same time, since the simultaneous start of several compressors and heaters creates a load spike on the wiring.

What Else Is Worth Checking

The noise level is indicated in decibels, and for a kitchen combined with a living room, a value below forty is comfortable. The number of compressors matters for separate temperature control in the compartments. The ability to reverse the doors will be useful if the kitchen layout is changed.

The availability of the manufacturer's service in Ukraine affects the real cost of ownership more than a small difference in price.


Sources

Publications by UNIAN, Vkurse, Pohliad UA, Allo and OLX blogs, materials from household appliance manufacturers