How to save energy in the refrigerator and freezer

The refrigerator and freezer work nonstop, but their consumption does not have to skyrocket. With a proper installation, a well-adjusted temperature, and finer usage habits, electricity costs can drop noticeably without harming food preservation. The difference is usually in the details: a door that does not close properly, a vent covered in dust, or a freezer with built-up ice force the motor to work harder than necessary.

Savings also start at the time of purchase. Since March 2021, the European energy label has returned to a scale from A to G, where A is the highest efficiency and G the worst. In practice, that means looking beyond size or design and paying attention to annual kilowatt-hour consumption, usable capacity, and noise. A smart choice can affect the bill for years, because these appliances run 24 hours a day.

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The correct temperature avoids unnecessary consumption

A refrigerator that is too cold does not preserve food better; it only consumes more. The most widely accepted reference in homes is 5 degrees Celsius for the refrigerator and -18 degrees for the freezer. That range maintains food safety and prevents the compressor from working longer than necessary. Lowering the temperature by a few extra degrees may seem prudent, but in reality it is a small, constant drain on money.

It is worth measuring the actual temperature from time to time instead of relying only on the internal dial. Many models do not show the exact value accurately, and the visual setting can be misleading. A refrigerator thermometer resolves that doubt with a clear reading. When the appliance takes longer to regain the cold after each opening, there is usually a cause behind it: too much load, worn seals, or a location that receives indirect heat.

The freezer deserves the same attention. Keeping it colder than necessary does not improve food quality, but it does increase spending. At -18 degrees, the right balance between preservation and efficiency is achieved. In older models, a small difference in the thermostat can translate into a noticeable increase in annual consumption, especially if the unit is large or operates in a poorly ventilated kitchen.

Location has more influence than it seems

The place where the refrigerator sits affects its performance just as a poorly oriented window affects a room’s temperature. Placing it next to the oven, the hot dishwasher, or in direct sunlight makes the compressor run in longer cycles to compensate for the outside heat. Away from heat sources, the appliance breathes better and needs less effort to keep the interior stable.

The space around it also matters. If the manufacturer does not indicate otherwise, it is wise to leave a few centimeters of free space at the back and on the sides to promote ventilation. That margin allows heat to dissipate more easily. When the rear vent or coil is too close to the wall, heat builds up and the motor works as if it were wearing a coat in the middle of summer.

Leveling is another often overlooked point. A poorly seated refrigerator may close worse, generate vibrations, and cause small losses of cold air. The problem is not always noticed immediately, but the consumption is. In kitchens with uneven floors or improvised installations, checking the appliance’s stability is one of those discreet tasks that yield lasting benefits.

Interior organization helps you spend less

Inside the refrigerator, cold air needs to move freely. When it is too full, the airflow is blocked and the machine must compensate with more work. When it is almost empty, the air is renewed quickly every time the door is opened and the temperature takes longer to stabilize. The balance point is order, not excess or emptiness.

Distribution also matters. Foods used daily should be placed at the front to reduce the time the door stays open, while meats, fish, and dairy need the coldest areas, usually the lower part of the compartment. The door is best used for less delicate items: sauces, drinks, or condiments. That organization avoids long searches, reduces unnecessary openings, and helps the internal temperature recover sooner.

The FIFO method, first in, first out, works well in the home refrigerator. Putting the oldest items in front reduces food waste and prevents forgotten products from spoiling at the back. Saving energy and avoiding waste usually go hand in hand: the less you throw away, the fewer urgent purchases you make and the fewer improvised openings the appliance suffers.

Cleaning keeps real efficiency intact

Dirt on the back, the vents, or the condenser acts like a blanket that traps heat. Even if the refrigerator keeps running, its ability to release energy outside is reduced. Cleaning those areas two or three times a year already makes a difference, especially in homes with dust, pets, or kitchens where the appliance accumulates airborne grease.

Inside, hygiene also has an effect. Food residue, moisture, and ice can disrupt cold circulation and force longer cycles. A clean appliance cools better because it works without obstacles. Frost is not decoration: it is a thermal barrier that reduces performance and increases consumption.

The door seals deserve periodic inspection. If they do not seal properly, cold air escapes and warm outside humidity enters. A simple test is to close a sheet of paper in the door; if it comes out easily, the seal may be deteriorated. In that case, the appliance does not fail suddenly, but it loses efficiency little by little, like a bicycle with a flat tire that keeps moving, although each pedal stroke takes more effort.

Defrosting on time avoids silent losses

In freezers that are not frost-free, accumulated ice not only takes up useful space: it also worsens cold transfer. When the frost layer reaches about 3 millimeters, it is a good time to defrost. Beyond that point, the machine begins to work against added resistance, which means more consumption and less storage space.

Defrosting should be done calmly and with the appliance empty. Turning it off, removing the food, and drying the inside well before plugging it back in prevents bad odors and residual moisture. In heavily iced units, the change is usually noticeable immediately after cleaning: the motor makes less noise and takes less time to recover the correct temperature.

No-frost models solve much of this problem, but they do not eliminate maintenance entirely. They also need cleaning, a good location, and a door in good condition. Technology helps, but it does not replace proper use. A modern freezer can perform poorly if installed in a hot corner or opened constantly throughout the day.

Which appliance consumes more and how much it weighs on the bill

In general terms, the freezer usually uses more electricity than the refrigerator because it works at a lower temperature and needs to better compensate for thermal losses. In average homes, a standard-size freezer can be around 200 to 300 kWh per year, although the real figure depends on the age of the unit, insulation, and usage. An efficient refrigerator can consume much less, but its behavior varies greatly depending on the format and capacity.

Extra features also change the picture. An integrated ice maker, for example, increases consumption compared with an equivalent model without that system. The same happens with very large appliances in small homes: the larger the volume being cooled, the more energy is usually needed to keep it stable. More capacity does not always mean more comfort; sometimes it means more spending for years.

In some homes, the refrigerator and freezer account for a very significant share of continuous electricity use because they never turn off. That is why any improvement in efficiency is noticeable in the long run. It is not about a dramatic reduction in a single month, but about a constant sum of small savings that, by the end of the year, do change the bill.

Buying an efficient model pays off for years

Choosing a good refrigerator starts with looking at the energy label, but it does not end there. Two appliances of the same size can have very different consumption depending on insulation, internal design, and compressor quality. Efficiency cannot be guessed from appearance; it is read in the technical sheet and compared carefully.

The current EU scale goes from A to G, which makes reading simpler compared with the old A+, A++, and A+++ system. In addition to annual consumption, it is worth checking the volume of each compartment, the noise level, and whether it includes functions that will actually be used. An inverter technology model, for example, better adapts compressor power to real demand and avoids sudden starts that waste energy.

The right size is just as important as the label. A refrigerator oversized for a two-person household can become a pit of unnecessary consumption. On the other hand, one that is too small forces food to be piled up, blocks airflow, and keeps the door open for longer. Efficiency also means choosing the right size, not just the energy class.

Everyday habits that cut consumption without effort

Many energy losses do not come from the appliance itself, but from how it is used every day. Opening the door several times in a few minutes, leaving it ajar while deciding what to take out, or putting in food that is still hot forces the interior to rebuild itself again and again. The refrigerator cannot work like a magic box; each disturbance costs it time and electricity.

Letting dishes cool before storing them also helps. Putting in steaming food raises the internal temperature and forces the compressor into an unnecessary battle. That simple gesture, as easy as waiting a few minutes, reduces effort and protects the rest of the contents. Cold is preserved better when it is not fighting the heat just out of the kitchen.

Vacations or long absences are another opportunity to check the condition of the unit. If it is going to stay on, it is a good idea to remove unnecessary items, check the seals, and adjust the temperature to the minimum needed. If the appliance will be turned off for a while, it should be cleaned and dried thoroughly before closing it. In all cases, the logic is the same: less humidity, less ice, less effort, and less consumption.

A lower bill starts at the kitchen door

Energy savings in the refrigerator and freezer do not depend on a single big measure, but on the sum of many small actions that reinforce each other. Correct temperature, good location, regular cleaning, and internal organization form a simple and effective combination. To that, add a smart purchase choice, because an efficient unit is noticeable from the first bill and throughout its useful life.

In a home, these appliances are like long-distance runners: they do not draw attention, they do not rest, and precisely for that reason any improvement matters a great deal. Basic maintenance and more attentive habits transform a fixed expense into one that is much more contained. The kitchen, in the end, has its own quiet economy, and the refrigerator and freezer occupy center stage in it.

Thinking that they always consume too much would be a mistake. They do run continuously, yes, but they also respond very clearly to changes in use. Saving energy here does not require dramatic sacrifices; it requires precision, a practical eye, and the calm discipline of doing everyday things well.