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Costs for 0.283 €/kWh · Eurostat 2026 H1

Split air conditioners · 3.5 kW · cooling and heating

HTWS035IX39PLUS2

A+++

Uses less electricity than 75% of the 3,067 split air conditioners, 3 kW on the EU register. At your selected price (European Union) that is €41 a year, €411 over ten years.

Cooling, SEER
8.5
Typical 6.5
Heating, SCOP
4.6
Typical 4.1
Cooling cost
€41 / year
+€206 if you also heat with it (average climate)

In the most efficient quarter of its group: 21 % below the typical 184 kWh. Class A+++ is the best class any model in this group reaches. Heating efficiency (SCOP 4.6) is above the typical 4.1 of its group. HTW has 13 models in this group; this one is number 2 among them. HTW sells the same label values under other model names: HTWS035IX21PLUS.

Where it stands

Rank 590 of 3,067 split air conditioners, 3 kW by yearly consumption. 589 use less.

Median 184 This model · 145 0 450 kWh ← uses less · uses more →

Next to it in the ranking

  1. A+++ Artica WHAPPRO12 145 kWh same
  2. A+++ HTWS035IX21PLUS 145 kWh same
  3. A+++ HTWS035IX39PLUS2 145 kWh
  4. A+++ Corproair CAST12 145 kWh same
  5. A+++ Corbero CSTECOPRO12 145 kWh same
See the full ranking

What it will cost you

Period HTWS035IX39PLUS2 NF-ST30CR Difference
1 year €41 €1 −€40
5 years €205 €4 −€201
10 years €411 €8 −€402
15 years €616 €13 −€603

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 145 kWh / yr
Heating, average climate 729 kWh / yr

Heating by climate zone

Climate SCOP kWh / yr
Warmer (e.g. Athens) 4.6 145
Average (e.g. Strasbourg) 4.6 729
Colder (e.g. Helsinki) 4.6 791

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+++ HTWS035IX39PLUS2 (this model)
3.5 kW8.5 145 — —
3.0 kW50.0 3 €40 €402
3.0 kW9.3 102 €12 €122
3.0 kW8.8 103 €12 €119
3.0 kW8.8 103 €12 €119
3.0 kW9.0 112 €9 €93

Label and product sheet

Energy class cooling / heating
A+++ / A+++
SEER
8.5
SCOP warmer / average / colder
4.6 / 4.6 / 4.6
Cooling design load
3.5 kW
Heating design load (average)
3.1 kW
Yearly cooling
145 kWh
Yearly heating (average climate)
729 kWh
Sound power indoor / outdoor
56 / 62 dB(A)
Refrigerant
R32 (GWP 12)

Model numbers and history

Registered by HTW under one model number.

HTWS035IX39PLUS2

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

Questions

How much does the HTWS035IX39PLUS2 cost to run?

At one cooling season as on the label it uses about 145 kWh a year according to its EU energy label. At the EU average household price of 0.283 €/kWh that is about €41 a year, or €411 over ten years.

What do SEER and SCOP mean?

This model reaches SEER 8.5 and SCOP 4.6 in the average climate: higher is better.