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Costs for 0.283 €/kWh · Eurostat 2026 H1

Split air conditioners · 5.9 kW · cooling and heating

Panasonic CS-E21RB4EAW / CU-E21RBEA

A+

Uses less electricity than 0% of the 5,158 split air conditioners, 4–5 kW on the EU register. At your selected price (European Union) that is €105 a year, €1,045 over ten years.

Cooling, SEER
5.6
Typical 6.8
Heating, SCOP
4.1
Typical 4.1
Cooling cost
€105 / year
+€387 if you also heat with it (average climate)

Uses more than most comparable models: 100 % of them need less. Panasonic CS-E9PD3EA / CU-E9PD3EA, the most efficient alternative on sale, saves about €62 a year. 90% of comparable models reach a better class than A+; the most common is A++. Heating efficiency (SCOP 4.1) is above the typical 4.1 of its group. Panasonic has 101 models in this group; this one is number 98 among them. On the register since 2019 and still on sale.

Where it stands

Rank 5,131 of 5,158 split air conditioners, 4–5 kW by yearly consumption. 5,130 use less.

Median 254 This model · 369 100 850 kWh ← uses less · uses more →

Next to it in the ranking

  1. A++ TCL TAC-24CHSD/TPH11IHB 366 kWh −€0.85
  2. A++ Terma Air Gelida 24 366 kWh −€0.85
  3. A+ Panasonic CS-E21RB4EAW / CU-E21RBEA 369 kWh
  4. B Hitachi RAC-50NPA / RAD-50RPA 372 kWh +€0.85
  5. A+++ AUX ASW-H24F7/ Q SERIES-EU 373 kWh +€1.13
See the full ranking

What it will cost you

Period CS-E21RB4EAW / CU-E21RBEA CS-E9PD3EA / CU-E9PD3EA Difference
1 year €105 €43 −€62
5 years €523 €214 −€309
10 years €1,045 €428 −€617
15 years €1,568 €641 −€926

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 369 kWh / yr
Heating, average climate 1,366 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+ Panasonic CS-E21RB4EAW / CU-E21RBEA (this model)
5.9 kW5.6 369 — —
5.8 kW2.5 151 €62 €617
5.8 kW2.5 151 €62 €617
5.4 kW8.9 211 €45 €447
5.6 kW3.4 213 €44 €442
5.4 kW8.8 215 €44 €436

Label and product sheet

Energy class cooling / heating
A+ / A+
SEER
5.6
SCOP warmer / average / colder
– / 4.1 / –
Cooling design load
5.9 kW
Heating design load (average)
4.0 kW
Yearly cooling
369 kWh
Yearly heating (average climate)
1,366 kWh
Sound power indoor / outdoor
58 / 63 dB(A)
Refrigerant
R410A (GWP 2088)

Model numbers and history

Registered by Panasonic under one model number.

CS-E21RB4EAW / CU-E21RBEA

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

Questions

How much does the Panasonic CS-E21RB4EAW / CU-E21RBEA cost to run?

At one cooling season as on the label it uses about 369 kWh a year according to its EU energy label. At the EU average household price of 0.283 €/kWh that is about €105 a year, or €1,045 over ten years.

What do SEER and SCOP mean?

This model reaches SEER 5.6 and SCOP 4.1 in the average climate: higher is better.