What gas is used in refrigerators: a complete guide to refrigerants 2026

Have you ever wondered what kind of mysterious gas circulates in the tubes of your refrigerator, maintaining the optimal temperature for food? This invisible but vital component is called refrigerant a special substance that absorbs heat inside the chamber and releases it outside through the condenser. Without it, the refrigerator would turn into an ordinary cabinet with a light.

Since the 1930s, when the first household refrigerators entered homes, refrigerants have undergone a real revolution. From toxic ammonia and explosive sulfur dioxide to modern environmentally friendly freons, each stage of development reflected not only technological progress, but also global environmental challenges. Today, the choice of gas for a refrigerator is determined not only by its cooling properties, but also impact on the ozone layer and the greenhouse effect. And if your refrigerator was manufactured after 2020, most likely, one of three main refrigerants works inside it: R600a (isobutane), R134a or R290 (propane).

But why do manufacturers abandon the usual freons in favor of hydrocarbons? How to recognize the type of gas in your refrigerator? And what should you do if you smell refrigerant in the kitchen? The answers to these questions are in our detailed analysis.

1. The evolution of refrigerants: from ammonia to environmentally friendly gases

The first refrigeration systems that appeared in the 19th century used ammonia (NH₃) an effective, but extremely toxic and corrosive gas. Its use required sealed industrial installations, and leaks often led to poisoning. In the 1920s, ammonia was replaced by chlorofluorocarbons (CFC), known as freons R12 i R22. They were safe for humans, but, as it turned out later, they destroyed the ozone layer.

The turning point came in 1987 with the signing of Montreal Protocol an international agreement on the gradual phase-out of ozone-depleting substances. This forced manufacturers to switch to hydrochlorofluorocarbons (HCFC) and hydrofluorocarbons (HFC)such as R134a. However, they also came under the radar of environmentalists due to their high global warming potential (GWP). Today, priority is given to natural refrigerants hydrocarbons (R600a, R290) and CO₂ (R744).

• 🔬 1850–1920s: ammonia, sulfur dioxide, methyl chloride (toxic, explosive).
• ⚗️ 1930–1980s: freons R12, R22 (ozone depleting).
• ♻️ 1990–2010s: R134a, R410A (low ozone potential, but high GWP).
• 🌿 2010–present: R600a, R290, R744 (environmentally friendly, but flammable).

⚠️ Attention: If your refrigerator was manufactured before 2000, it may contain R12 or R22. These gases are prohibited from production, but their leakage is still dangerous for the ozone layer. When repairing such models. a complete replacement of the refrigerant with a modern analogue is required.

2. Modern refrigerants: comparison of R600a, R134a and R290

The three most common gases in refrigerators of the 2020s are R600a (isobutane), R134a (tetrafluoroethane) and R290 (propane). Each of them has unique properties that affect cooling efficiency, energy consumption and safety. Let's look at them in more detail.

R600a today it is the leader among refrigerants for household refrigerators due to its low GWP and high efficiency. It is used in models Liebherr, Beko, Indesit and many others. However, its flammability requires special care during repairs. R134a, although not flammable, is gradually being replaced due to its high GWP (476 times higher than that). y R600a!). R290 is the most promising, but its use is limited due to strict safety standards.

3. How to determine what kind of gas is in your refrigerator?

You can find out the type of refrigerant in several ways without disassembling the refrigerator. First, look into the technical passport devices - it will definitely be indicated there. refrigerant in the “Technical Specifications” or “Refrigerant” section. If the documentation is lost, look for nameplate (metal plate) on the back wall of the refrigerator or inside the chamber. It usually has an inscription like "Refrigerant: R600a" or "Gas: R134a».

If there is neither a passport nor a nameplate, pay attention to make and model refrigerator:

• 🔍 Most modern models Liebherr, Beko, ATLANT use R600a.
• 🔍 Refrigerators Samsung and LG older than 2018 often work on R134a.
• 🔍 Industrial and some premium models (for example, Miele) may contain R290.

Another indirect sign is smell. Hydrocarbons (R600a, R290) when leaked have a weak specific odor, similar to gas for refilling lighters. R134a almost no smell. However never intentionally try to identify gas by smell - it is dangerous!

4. Safety: what to do if there is a refrigerant leak?

A refrigerant leak is a rare but dangerous occurrence If you smell or notice gas. oily stains on the floor near the refrigerator (a sign of oil leakage along with the refrigerant), act quickly:

1. 🚪 Immediately open windows to ventilate.
2. 🔌 Disconnect the refrigerator from the mains (do not pull out the plug with wet hands!).
3. 📞 Leave the room and call a refrigerator repairman.
4. 🔥 Do not turn on lights and electrical appliances - if there is a leak flammable gas (R600a, R290), a spark can cause a fire.

Particularly dangerous R290 (propane) - it forms explosive mixtures with air when concentrated 2–10%. R600a less volatile, but also flammable. R134a not flammable, but in high concentrations can cause suffocation.

⚠️ Attention: If a leak occurs in a refrigerator with a system No Frost, do not try to repair it yourself. In such models, the refrigerant is! circulates under high pressure, and unprofessional intervention can lead to rupture of the tubes.

Ventilate the room|Disconnect the refrigerator from the mains|Do not use open flame|Call a service technician|Do not turn on the refrigerator until the leak is eliminated-->

5. Advantages and disadvantages of popular refrigerants

The choice of refrigerant affects not only the environment, but also the operation of the refrigerator. Let's consider the pros and cons of each option:

R600a (isobutane)

• ✅ Environmentally friendly: GWP = 3 (400 times less than that R134a).
• ✅ Energy efficiency: consumes 10–15% less electricity.
• ✅ Low cost: cheaper R134a and R290.
• ❌ Flammability: requires special equipment for refueling.
• ❌ Limited quantity: fill the refrigerator with no more than 150 grams.

R134a

• ✅ Safety: non-flammable, non-toxic.
• ✅ Widespread: easy to maintain.
• ❌ Climate harm: GWP = 1430 (banned in the EU from 2026 for new models).
• ❌ Less efficiency: refrigerators on R134a consume more energy.

R290 (propane)

• ✅ Better heat transfer: cools faster than R600a.
• ✅ Environmentally friendly: GWP = 3.
• ❌ High flammability: requires enhanced sealing of the system.
• ❌ Expensive repairs: few craftsmen work with R290 due to risks.

6. The future of refrigerants: what awaits refrigeration equipment?

The European Union has already banned the use of R134a in new refrigerators from 2026 due to high GWP. Following the EU, these standards will begin to apply in others. countries. The main candidates for replacement are:

• 🌍 R600a and R290: their share will grow, despite their flammability.
• ❄️ R744 (CO₂): already used in industrial refrigerators, but require high pressure.
• 🔬 New synthetic refrigerants: for example, R454C (GWP = 146) as a temporary alternative.

Manufacturers are also experimenting with magnetic cooling (without gases!) and thermoelectric systems, but these technologies are still far from the mass market. For now, R600a remains the golden mean for household refrigerators.

⚠️ Attention: Refrigerant standards may vary depending on the region. For example, the USA has its own EPA standards, and the EU has regulations. F-Gas. Before purchasing a refrigerator, check the current requirements for your country.

7. Myths and truth about refrigerants in refrigerators

There are many myths around refrigerants:

Myth 1: "Refrigerators on R600a explode."

True: For an explosion you need a gas concentration in the air of 1.3-8.5% and a source of open fire. In domestic conditions, this is almost impossible - there is only 50-150 grams of gas in the refrigerator, and it quickly. dissipates.

Myth 2: «R134a completely safe."

True: It is not flammable, but in high concentrations it displaces oxygen, which can lead to suffocation. In addition, its leakage is harmful. climate.

Myth 3: "You can fill the refrigerator with any gas."

Truth: Each refrigerant requires a specific compressor and oil. For example, R600a is incompatible with. mineral oils used for R134a.

Why do No Frost refrigerators use less gas?

In No Frost systems, the refrigerant circulates through a more compact circuit, and the chamber is cooled by a fan. Therefore, the volume of gas in such models is 20-30% less than in drip models. refrigerators.

FAQ: Frequently asked questions about refrigerants

❓ Is it possible to fill the refrigerator with gas yourself?

No. Refilling requires special equipment, a vacuum pump and a certified refrigerant. In addition, hydrocarbons (R600a, R290) are flammable, and their leakage during unprofessional repairs can lead to a fire. Contact only certified service centers.

❓ How often do you need to check the gas level in the refrigerator?

Under normal conditions, the refrigerant does not evaporate - the system is sealed only when there are signs of a leak: poor cooling, constant operation. compressor, oil stains on the floor. The average service life of the refrigerant is 10–15 years.

❓ Is refrigerant harmful to health?

Modern refrigerants (R600a, R134a, R290) in low concentrations are harmless, however, if leaked R134a in large quantities may cause dizziness, and hydrocarbons pose a fire risk. The main danger is not toxicity, but displacement of oxygen or fire.

❓ Why does a new refrigerator smell like gas?

A faint odor in the first days of operation is normal for refrigerators on R600a or R290. These are residual vapors after refueling at the factory. If the smell does not disappear after a week or becomes stronger, this is a sign of a leak - contact the service.

❓ Is it possible to transfer the refrigerator from R134a to R600a?

Technically possible, but it is not economically feasible. It will be necessary to replace the compressor, oil, filter drier and flush the system. The cost of such repairs often exceeds the price of a new refrigerator.