How much will a “refrigerator plus a refrigerator” be? Let's look at physics, mathematics and practice

The phrase "refrigerator plus refrigerator" sounds like a mathematical problem from a school textbook, but in fact it hides several practical questions at once. Some are looking for an answer to an abstract example from physics (how do capacities or volumes add up?), others want to understand Is it possible to connect two refrigerators to one outlet without the risk of fire, and still others are looking for a way to increase the space for storing food. We will analyze all three scenarios - from theory to specific instructions.

In this article you will find not only the answer to "how much is 1 + 1", but also practical tips for combining refrigeratorscalculation of network load and alternative solutions (for example, chest freezers or built-in modules). And also - debunk the myths that two refrigerators in the same room “spoil each other” or that they cannot be placed close together.

Spoiler: from a mathematical point of view, the answer is simple — 1 + 1 = 2, but in real life everything depends on the context. If we are talking about total power, then kilowatts, starting currents and wiring cross-section play a role here. If o total volume it is important to take into account the dimensions of the room and the location of the equipment. Well, if you just wanted to joke, welcome to the world of memes about “the refrigerator that cools the refrigerator.”

1. “Refrigerator + refrigerator” from the point of view of mathematics and physics

Let's start with the basic: what does the addition of two refrigerators mean in different contexts?

If we are talking about quantity, then everything is elementary: one refrigerator Samsung RB37A5241SA plus a second refrigerator ATLANT XM 4021-000 will be given to you two separate devices. But it becomes more interesting when we talk about characteristics:

• 📏 Volume: Useful liters are summed up. For example, 350 l + 200 l = 550 l of total space for products.
• ⚡ Power: Kilowatts are summed up (but not everything is so simple - see the section on electrics).
• 🌡️ Temperature conditions: Two refrigerators are not “reinforce” each other - each works autonomously.
• 💰 Cost: The price of two refrigerators = the price of the first + the price of the second (but sometimes it’s more profitable to buy one big one).

And now physical paradox: if you install two refrigerator close to each other, they will begin heat each other with compressors. This is not “magic”, but the law of conservation of energy: the heat removed from one unit will heat the body of the second. As a result, both can work less efficientlywasting more electricity. Research shows that if two refrigerators are placed closely together, their energy consumption can increase by 10–15% due to mutual heating.

By the way, about mathematics: there is a joke on the Internet that "refrigerator + refrigerator = freezer". This is, of course, incorrect from a technical point of view, but partly true from the point of view storage logic: two refrigerators can really replace one large freezer if both are set to the minimum temperature.

2. Is it possible to connect two refrigerators to one outlet?

This question worries many who want to save on wiring or simply do not have free outlets. Short answer: technically possible, but highly not recommended without calculations. Here's why:

Every refrigerator has a starting currentthat is 3-5 times higher than the nominal one. For example, if the sign indicates 150 W, then when the compressor starts, 450–750 Wis briefly consumed. If two refrigerators turn on the compressors at the same time (and this happens accidentally), the socket or wiring may not withstand it..

Acceptable scenarios for connecting to one outlet:

• ✅ Two low-power refrigerators (up to 100 W each) with different operating cycles (for example, one during the day, the other at night).
• ✅ Refrigerator + other equipment with low starting current (for example, LED TV).
• ❌ Two refrigerators with inverter compressors - they can synchronize cycles and create a peak load.

How to properly connect?

1. Use an extension cord with overload protection (for example, APC SurgeArrest).
2. Check the cross-section of the wire in the wall - for two refrigerators you need at least 2.5 mm².
3. Do not connect via tees or cheap “pilots”.

⚠️ Attention: If your house has old aluminum wiring, connecting two refrigerators to the same line can lead to fire. In this case, be sure to consult an electrician.

3. How to calculate the total power of two. refrigerators?

To understand will the network hold up? two refrigerators, you need to take into account not only their rated power, but also demand factor (the probability of simultaneous operation). Here is the formula: whether the network can withstand the coefficient). demand

Total power (kW) = (P₁ + P₂) × K, where:

• P₁, P₂ — power of the first and second refrigerator (indicated on the sticker on the back).
• K — demand coefficient (for refrigerators usually 0.7–0.8, since they do not work constantly).

Calculation example for two models:

In this case 210 W × 0.8 = 168 W —seemingly light load. But remember about starting currents: 6.3 And can become a problem if the wiring is weak. For comparison: a standard socket is designed for 16 A (3500 W), but this maximum, and not the operating mode.

What to do if the power exceeds the norm?

• 🔌 Connect refrigerators to different groups sockets (with separate machines).
• ⏱️ Configure on timersso that the cycles do not coincide.
• 🔋 Use voltage stabilizer (for example, Resanta ASN-2000 N/1-C).

⚠️ Attention: If in your area there are frequent voltage drops, two refrigerators in the same network increase the risk of compressor failure. In this case, be sure to. install voltage control relay (for example, Zubr D63t).

4. Is it possible to place two refrigerators back to back?

No, you can’t. And here’s why:

Refrigerators dissipate heat through the rear grille (condenser). If you place them close together, three problems will arise:

1. Overheating compressors —both will operate in extreme mode.
2. Increased energy consumption —up to +20% of normal consumption.
3. Risk of breakdown —starting relays or thermostats burn out.

Minimum distances (by manufacturer standards):

• 🔳 Between rear walls: 5–10 cm (for air circulation).
• 🔳 From the side walls: 2–3 cm (so as not to vibrate).
• 🔳 From the ceiling: 10–15 cm (if the refrigerator is high).

How to place two refrigerators in a small kitchen?

• 📐 Place corner (back walls in different directions).
• 🪟 Use ventilation grille between them (sold in HVAC stores).
• 🔄 Swap places freezer and refrigerator compartmentsif the models are different.

What will happen if you ignore the gaps?

If the refrigerators are tightly arranged, they will begin to “compete” in cooling: one will heat the other, which will respond with increased compressor operation. As a result, both will last 1.5–2 times less than the expected period, and electricity bills will increase by 15–30%.

5. Alternatives to a second refrigerator: which is more profitable?

Before buying a second refrigerator, perhaps evaluate the alternatives. one of these solutions is suitable:

When is a second refrigerator justified?

• 🏠 A large family (4+ people) lives in the house.
• 🍖 You you prepare food for future use (meat, vegetables for the winter).
• 🍷 You need different temperature zones (for example, for wine and meat).
• 🏢 You have a business (mini-cafe, store).

When is it better to choose an alternative?

• 🏡 Small kitchen (less than 10 m²).
• ⚡ Weak wiring (aluminum, old automatic machines).
• 💰 Budget is limited (it’s cheaper to buy one large refrigerator).

6. Myths about two refrigerators: what is true and what is not?

There are many myths floating around the topic of “two refrigerators”:

❌ Myth 1: “Two refrigerators in one room spoil each other. friend.”

✅ Reality: They don’t “spoil”, but increase the load on the power grid they can overheatif they are placed close together, there is no harm.

❌ Myth 2: “Two refrigerators consume twice as much electricity.”

✅ Reality: No, because they do not work at the same time. Total consumption will be 20–30% less than just 2 × (consumption of one).

❌ Myth 3: “If you put refrigerators back to back, they will burn.”

✅ Reality: They won’t burn, but will be less effective. The main thing is to provide clearances for ventilation.

❌ Myth 4: “Two refrigerators in one room create harmful microclimate."

✅ Reality: Only if the room poorly ventilatedRefrigerators dry the air, so with two units it is useful to use humidifier.

❌ Myth 5: “You can save money by buying two used refrigerators instead of one new one.”

✅ Reality: Only if both are in perfect condition Most often repairing two old ones it costs more than one new one. guarantee.

7. How to properly operate two refrigerators?

If you do end up with two refrigerators, follow these rules to make them last longer:

1. Temperature setting

• 🌡️ In main refrigerator: +4°C (refrigerator), −18°C (freezer).
• 🥶 In the second refrigerator:
  • If you store products — −20°C.
  • If drinks/fruits — +6°C.

2. products

• 🥩 Meat, fish —in the second refrigerator (freezer).
• 🥦 Vegetables, dairy products —in the main one.
• 🍷 Wine, cheeses —in the freshness zone (if any).

3. Care and cleaning

• 🧹 Defrost one by one (not at the same time!).
• 🔌 Once a month check plugs and sockets for heating.
• 🧽 Wash the seals soap solution (not with aggressive chemicals!).

⚠️ Attention: If you are leaving for a long time (for example, on vacation), do not turn off both refrigerators at the same time. Leave one to operate in minimum mode (+10°C) to avoid condensation and rust on parts.

FAQ: Frequently asked questions about two refrigerators

❓ Is it possible to connect a refrigerator and a freezer to one socket?

Yes, but only if their total power does not exceed 2000 W, and the socket is connected via a separate machine 16A. It is better to use extension cord with overload protection.

❓ How much electricity do two refrigerators consume per month?

On average:

• One class refrigerator A+++ — 15–20 kW/month.
• Two refrigerators (A++ and A+) - 40–50 kW/month.
• If both are old (class C) - up to 80–100 kW/month.

To save, set defrost by timer (at night, when the tariff is lower).

❓ Which refrigerator should you choose second: large or small?

Depends on the purpose:

• For products — chest freezer for 200+ liters.
• For drinks - small (100–150 l) with a freshness zone.
• For family — second full-size (300–400 l) with No Frost.

❓ Is it harmful to sleep in a room where there are two refrigerators?

No, if:

• Room good ventilated (refrigerators dry the air).
• The noise level does not exceed 40 dB (check in the model data sheet).
• No ozone smell (a sign of freon leakage - check urgently!).

For sleep, it is better to choose models with an inverter compressor (for example, LG GA-B489 YDQZ).

❓ Is it possible to put a refrigerator on a refrigerator?

Absolutely not! This violates:

• Balancing —the top one may fall.
• Ventilation —the bottom one will overheat.
• Warranty —manufacturers prohibit such designs.

Alternative: use rack or install refrigerators nearby with a gap.