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Costs for 0.283 €/kWh · Eurostat 2026 H1

Split air conditioners · 5.2 kW · cooling and heating

LG RM3U19 U24 / RMN09 NSJ , RMN12 NSJ

A++

Uses less electricity than 53% of the 5,158 split air conditioners, 4–5 kW on the EU register. At your selected price (European Union) that is €70 a year, €702 over ten years.

Cooling, SEER
7.4
Typical 6.8
Heating, SCOP
4.3
Typical 4.1
Cooling cost
€70 / year
+€453 if you also heat with it (average climate)

Near the middle of its group: 2 % below the typical 254 kWh. Class A++ is the most common class in this group (69% of models). Heating efficiency (SCOP 4.3) is above the typical 4.1 of its group. LG has 68 models in this group; this one is number 19 among them.

Where it stands

Rank 2,377 of 5,158 split air conditioners, 4–5 kW by yearly consumption. 2,376 use less.

Median 254 This model · 248 100 850 kWh ← uses less · uses more →

Next to it in the ranking

  1. A++ Bosch 7733704093 248 kWh same
  2. A++ IVT 7733704099 248 kWh same
  3. A++ LG RM3U19 U24 / RMN09 NSJ , RMN12 NSJ 248 kWh
  4. A++ LG RM3U19 U24 / RMN09 NSJ * 2 , RMN12 NSJ 248 kWh same
  5. A++ Panasonic S-50PY3E / U-50PZH3E5 248 kWh same
See the full ranking

What it will cost you

Period RM3U19 U24 / RMN09 NSJ , RMN12 NSJ LEP35Xi R16 / LOP35Xo R16 Difference
1 year €70 €37 −€33
5 years €351 €185 −€166
10 years €702 €371 −€331
15 years €1,054 €556 −€497

Is the more efficient model worth its price?

Years of use

Enter both purchase prices to see the total cost of ownership.

Cooling and heating

Cooling season 248 kWh / yr
Heating, average climate 1,601 kWh / yr

Same size, lower running cost

On sale, at least 10% less energy, same size group

Model CoolingSEER kWh / yr Saves / year in 10 years
A++ LG RM3U19 U24 / RMN09 NSJ , RMN12 NSJ (this model)
5.2 kW7.4 248 — —
5.1 kW9.4 131 €33 €331
5.3 kW7.0 132 €33 €329
5.3 kW7.0 132 €33 €329
5.8 kW2.5 151 €27 €275
5.8 kW2.5 151 €27 €275

Label and product sheet

Energy class cooling / heating
A++ / A+
SEER
7.4
SCOP warmer / average / colder
– / 4.3 / –
Cooling design load
5.2 kW
Heating design load (average)
6.3 kW
Yearly cooling
248 kWh
Yearly heating (average climate)
1,601 kWh
Sound power indoor / outdoor
57 / 62 dB(A)
Refrigerant
R32 (GWP 675)

Model numbers and history

Registered by LG under one model number.

RM3U19 U24 / RMN09 NSJ , RMN12 NSJ

  1. First published in the EU register (EPREL)
  2. Placed on the EU market

Questions

How much does the LG RM3U19 U24 / RMN09 NSJ , RMN12 NSJ cost to run?

At one cooling season as on the label it uses about 248 kWh a year according to its EU energy label. At the EU average household price of 0.283 €/kWh that is about €70 a year, or €702 over ten years.

What do SEER and SCOP mean?

This model reaches SEER 7.4 and SCOP 4.3 in the average climate: higher is better.