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Costs for 0.283 €/kWh · Eurostat 2026 H1

Split air conditioners · 4.1 kW · cooling and heating

Ferroli DIAMANT M 21-3 PLUS

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 €99 a year, €991 over ten years.

Cooling, SEER
6.1
Typical 6.8
Heating, SCOP
4.0
Typical 4.1
Cooling cost
€99 / year
+€555 if you also heat with it (average climate)

Uses more than most comparable models: 100 % of them need less. Bosch 7733704026, the most efficient alternative on sale, saves about €58 a year. Class A++ is the most common class in this group (69% of models). Heating efficiency (SCOP 4.0) is below the typical 4.1 of its group. Of 24 Ferroli models in this group, it ranks last. On the register since 2021 and still on sale.

Where it stands

Rank 5,110 of 5,158 split air conditioners, 4–5 kW by yearly consumption. 5,109 use less.

Median 254 This model · 350 100 850 kWh ← uses less · uses more →

Next to it in the ranking

  1. A+ Daikin FFA60A2VEB9 / RXS60L2V1B 349 kWh −€0.28
  2. A+ Daikin FFA60A2VEB / RXS60L2V1B 349 kWh −€0.28
  3. A++ Ferroli DIAMANT M 21-3 PLUS 350 kWh
  4. A+ Daikin ADEA60A2VEB / ARXS60L2V1B 350 kWh same
  5. A++ Sensei SAC-18SKW/I 352 kWh +€0.57
See the full ranking

What it will cost you

Period DIAMANT M 21-3 PLUS 7733704026 Difference
1 year €99 €41 −€58
5 years €496 €204 −€292
10 years €991 €408 −€583
15 years €1,487 €612 −€875

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 350 kWh / yr
Heating, average climate 1,960 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++ Ferroli DIAMANT M 21-3 PLUS (this model)
4.1 kW6.1 350 — —
4.0 kW8.5 144 €58 €583
4.0 kW8.5 144 €58 €583
4.1 kW2.6 145 €58 €581
4.2 kW9.9 148 €57 €572
4.2 kW9.9 148 €57 €572

Label and product sheet

Energy class cooling / heating
A++ / A+
SEER
6.1
SCOP warmer / average / colder
– / 4.0 / –
Cooling design load
4.1 kW
Heating design load (average)
5.6 kW
Yearly cooling
350 kWh
Yearly heating (average climate)
1,960 kWh
Sound power indoor / outdoor
54 / 65 dB(A)
Refrigerant
R32 (GWP 675)

Model numbers and history

Registered by Ferroli under one model number.

DIAMANT M 21-3 PLUS

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

Questions

How much does the Ferroli DIAMANT M 21-3 PLUS cost to run?

At one cooling season as on the label it uses about 350 kWh a year according to its EU energy label. At the EU average household price of 0.283 €/kWh that is about €99 a year, or €991 over ten years.

What do SEER and SCOP mean?

This model reaches SEER 6.1 and SCOP 4.0 in the average climate: higher is better.