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Air conditioners · 67 models

Most efficient 3.5 kW air conditioners (2026)

67 models in our database meet this; below the first 25 in order.

Criteria:

  • Cooling capacity from 3.3 up to 3.8 kW
  • Sorted by: SEER (cooling) (highest first)

A ranking based on manufacturer and register data, not a test: we have not measured the units ourselves, and price, installation and service are not included. The source of every value is on the product page.

The ranking

  1. Midea MSOPBU-12HRFN8-ME-SET

    SEER (cooling) 9.2

    • SEER (cooling) 9.2: the best of 67 models in this selection
    • SCOP (heating) 5.3: the best of 67 models in this selection
    • Weaker point: Indoor unit sound power 59 dB(A): no. 57 of 67 models

    Choose this model if you mainly cool and want to keep summer electricity use as low as possible.

  2. LG F12MT

    SEER (cooling) 9.1

    • SEER (cooling) 9.1: no. 2 of 67 models
    • SCOP (heating) 5.1: no. 2 of 67 models
    • Weaker point: Indoor unit sound power 60 dB(A): no. 62 of 67 models

    Choose this model if you mainly cool and want to keep summer electricity use as low as possible.

  3. LG H12AP U24/H12AP NSM

    SEER (cooling) 9.1

    • SEER (cooling) 9.1: no. 2 of 67 models
    • SCOP (heating) 5.1: no. 2 of 67 models
    • Weaker point: Indoor unit sound power 60 dB(A): no. 62 of 67 models

    Choose this model if you mainly cool and want to keep summer electricity use as low as possible.

  4. HISENSE QK35WM0BG / AS35WM0EW

    SEER (cooling) 8.8

    • SEER (cooling) 8.8: no. 4 of 67 models
    • SCOP (heating) 5.1: no. 2 of 67 models

    Choose this model if you mainly cool and want to keep summer electricity use as low as possible.

  5. BROKTON BRST12

    SEER (cooling) 8.5

    • Indoor unit sound power 53 dB(A): no. 9 of 67 models

    Choose this model if the indoor unit goes in a bedroom, living room or another quiet space.

  6. GORENJE DION35IN MB+DION35OUT2 MB
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    GORENJE DION35IN MB+DION35OUT2 MB

    SEER (cooling) 8.5

  7. Gree GWH12AFCXD-K6DNA1D

    SEER (cooling) 8.5

    • SCOP (heating) 4.8: no. 7 of 67 models
    • Weaker point: Indoor unit sound power 59 dB(A): no. 57 of 67 models

    Choose this model if you also use the air conditioner for heating.

  8. Gree GWH12AUCXD-K6DNA1E

    SEER (cooling) 8.5

    • SCOP (heating) 4.8: no. 7 of 67 models

    Choose this model if you also use the air conditioner for heating.

  9. Gree GWH12AUCXD-K6DNA2C

    SEER (cooling) 8.5

    • Weaker point: Indoor unit sound power 60 dB(A): no. 62 of 67 models

  10. Gree GWH12AWCXD-K6DNA1D

    SEER (cooling) 8.5

    • SCOP (heating) 4.8: no. 7 of 67 models

    Choose this model if you also use the air conditioner for heating.

  11. Gree GWH12AZCXD-K6DNA1D

    SEER (cooling) 8.5

    • SCOP (heating) 4.8: no. 7 of 67 models

    Choose this model if you also use the air conditioner for heating.

  12. Gree GWH12QCXD-K6DNE4C

    SEER (cooling) 8.5

    • Weaker point: Indoor unit sound power 60 dB(A): no. 62 of 67 models

  13. Gree GWH12QD-S6DBB4A

    SEER (cooling) 8.5

    • SCOP (heating) 5.1: no. 2 of 67 models

    Choose this model if you also use the air conditioner for heating.

  14. GRUNDIG GEEPN 120/ GEEPN 121 8506223600

    SEER (cooling) 8.5

  15. Haier AC35S2SG1FA(H) / 1U35S2SM1FA-2

    SEER (cooling) 8.5

    • Indoor unit sound power 53 dB(A): no. 9 of 67 models

    Choose this model if the indoor unit goes in a bedroom, living room or another quiet space.

  16. Haier AS35S2SF1FA-MB3 / 1U35S2SM1FA-2
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    Haier AS35S2SF1FA-MB3 / 1U35S2SM1FA-2

    SEER (cooling) 8.5

  17. Haier AS35S2SF1FA-MW3 / 1U35S2SM1FA-2
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    Haier AS35S2SF1FA-MW3 / 1U35S2SM1FA-2

    SEER (cooling) 8.5

  18. Haier AS35XCAHRA / 1U35S2SM1FA-2

    SEER (cooling) 8.5

    • SCOP (heating) 4.7: no. 11 of 67 models

    Choose this model if you also use the air conditioner for heating.

  19. Haier HAS12RDAIN / H1U12RDAOUT

    SEER (cooling) 8.5

    • Weaker point: Indoor unit sound power 60 dB(A): no. 62 of 67 models

  20. HISENSE HA35XU00G/AS35XU0EW

    SEER (cooling) 8.5

  21. HISENSE HB35XU0AG/AS35XU0EW

    SEER (cooling) 8.5

  22. HISENSE HB35XU0BG/AS35XU00W

    SEER (cooling) 8.5

  23. HISENSE QE35XV4EG/AS35XV04W
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    HISENSE QE35XV4EG/AS35XV04W

    SEER (cooling) 8.5

    • SCOP (heating) 5.1: no. 2 of 67 models
    • Weaker point: Outdoor unit sound power 65 dB(A): no. 56 of 67 models

    Choose this model if you also use the air conditioner for heating.

  24. HISENSE QJ35XJ3AG/AS35XJ03W
    Image: HISENSErequest removal

    HISENSE QJ35XJ3AG/AS35XJ03W

    SEER (cooling) 8.5

  25. INFINITON SPTSM12A3

    SEER (cooling) 8.5

All figures at a glance

#Model1SEER (cooling)Cooling capacitySCOP (heating)Indoor unit sound powerOutdoor unit sound powerRefrigerant
1Midea MSOPBU-12HRFN8-ME-SET9.23.5 kW5.359 dB(A)60 dB(A)R32
2LG F12MT9.13.5 kW5.160 dB(A)65 dB(A)R32
3LG H12AP U24/H12AP NSM9.13.5 kW5.160 dB(A)65 dB(A)R410A
4HISENSE QK35WM0BG / AS35WM0EW8.83.5 kW5.155 dB(A)63 dB(A)R32
5BROKTON BRST128.53.5 kW4.653 dB(A)63 dB(A)R32
6GORENJE DION35IN MB+DION35OUT2 MB8.53.5 kW4.657 dB(A)64 dB(A)R32
7Gree GWH12AFCXD-K6DNA1D8.53.5 kW4.859 dB(A)63 dB(A)R32
8Gree GWH12AUCXD-K6DNA1E8.53.5 kW4.858 dB(A)63 dB(A)R32
9Gree GWH12AUCXD-K6DNA2C8.53.5 kW4.660 dB(A)64 dB(A)R32
10Gree GWH12AWCXD-K6DNA1D8.53.5 kW4.858 dB(A)63 dB(A)R32
11Gree GWH12AZCXD-K6DNA1D8.53.5 kW4.858 dB(A)63 dB(A)R32
12Gree GWH12QCXD-K6DNE4C8.53.5 kW4.660 dB(A)64 dB(A)R32
13Gree GWH12QD-S6DBB4A8.53.5 kW5.158 dB(A)62 dB(A)R32
14GRUNDIG GEEPN 120/ GEEPN 121 85062236008.53.5 kW4.656 dB(A)62 dB(A)R32
15Haier AC35S2SG1FA(H) / 1U35S2SM1FA-28.53.5 kW4.553 dB(A)61 dB(A)R32
16Haier AS35S2SF1FA-MB3 / 1U35S2SM1FA-28.53.5 kW4.655 dB(A)61 dB(A)R32
17Haier AS35S2SF1FA-MW3 / 1U35S2SM1FA-28.53.5 kW4.655 dB(A)61 dB(A)R32
18Haier AS35XCAHRA / 1U35S2SM1FA-28.53.5 kW4.757 dB(A)61 dB(A)R32
19Haier HAS12RDAIN / H1U12RDAOUT8.53.3 kW4.660 dB(A)65 dB(A)R32
20HISENSE HA35XU00G/AS35XU0EW8.53.5 kW4.657 dB(A)64 dB(A)R32
21HISENSE HB35XU0AG/AS35XU0EW8.53.5 kW4.657 dB(A)64 dB(A)R32
22HISENSE HB35XU0BG/AS35XU00W8.53.5 kW4.657 dB(A)64 dB(A)R32
23HISENSE QE35XV4EG/AS35XV04W8.53.5 kW5.155 dB(A)65 dB(A)R32
24HISENSE QJ35XJ3AG/AS35XJ03W8.53.5 kW4.658 dB(A)64 dB(A)R32
25INFINITON SPTSM12A38.53.5 kW4.655 dB(A)62 dB(A)SPTSM12A3

Compare all models →

How this ranking is made

This selection is put together automatically from the 67 models in our database that meet the criteria above. We only include models whose figures for the ranking are known: without those values a model cannot be compared fairly, so it drops out. The list is recalculated with every data update, so the order can change as soon as manufacturers or registers publish new values.

The order follows a single feature: SEER (cooling) (highest first). Where values are equal, the alphabetical order of brand and model decides. The other features are shown as extra columns in the table so you can see how a model does on other points; a model at the top for this one feature can be weaker elsewhere.

The reasoning for each place is derived automatically from the same data. We name the features on which the model is in the best quarter of this selection, functions that not every model has, and a weaker point if the model falls in the bottom quarter on it. The line ‘Choose this model if …’ links the most heavily weighted strength to a situation where it matters. This is not a test and not personal advice: the installation, your home and the price also decide what works best for you.

The values come from EPREL; the product page shows the source of every value. How we collect and check the data →

More selections

Sources

  1. European Product Registry for Energy Labelling (EPREL) — Europese Commissie · accessed 9 Oct 2026