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Heat pump water heaters · 450 models

Most efficient heat pump water heaters (highest ηwh, 2026)

Sorted by water heating efficiency ηwh. Only compare within the same load profile: a larger profile often reaches a higher figure without the appliance being better.

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

Criteria:

  • Sorted by: Water heating efficiency ηwh (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. ENERGIE AQUAPURA BOOSTER 200I

    Water heating efficiency ηwh 226 %

    • Water heating efficiency ηwh 226 %: joint best of 450 models
    • Indoor sound power 45 dB(A): no. 43 of 395 models

    Choose this model if you want to keep the electricity used for hot water as low as possible.

  2. ENERGIE AQUAPURA BOOSTER 300I

    Water heating efficiency ηwh 226 %

    • Water heating efficiency ηwh 226 %: joint best of 450 models
    • Indoor sound power 45 dB(A): no. 43 of 395 models

    Choose this model if you want to keep the electricity used for hot water as low as possible.

  3. Eco Hot Water 01-05 150l

    Water heating efficiency ηwh 225 %

    • Water heating efficiency ηwh 225 %: no. 3 of 450 models
    • Indoor sound power 46 dB(A): no. 54 of 395 models

    Choose this model if you want to keep the electricity used for hot water as low as possible.

  4. Oekoboiler ZG 02-05 150l
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    Oekoboiler ZG 02-05 150l

    Water heating efficiency ηwh 225 %

    • Water heating efficiency ηwh 225 %: no. 3 of 450 models
    • Indoor sound power 46 dB(A): no. 54 of 395 models

    Choose this model if you want to keep the electricity used for hot water as low as possible.

  5. Eco Hot Water 01-05 200l

    Water heating efficiency ηwh 215 %

    • Water heating efficiency ηwh 215 %: no. 5 of 450 models
    • Indoor sound power 46 dB(A): no. 54 of 395 models

    Choose this model if you want to keep the electricity used for hot water as low as possible.

  6. Oekoboiler ZG 02-05 200l
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    Oekoboiler ZG 02-05 200l

    Water heating efficiency ηwh 215 %

    • Water heating efficiency ηwh 215 %: no. 5 of 450 models
    • Indoor sound power 46 dB(A): no. 54 of 395 models

    Choose this model if you want to keep the electricity used for hot water as low as possible.

  7. Eco Hot Water 01-05 300l

    Water heating efficiency ηwh 206 %

    • Water heating efficiency ηwh 206 %: no. 7 of 450 models
    • Indoor sound power 46 dB(A): no. 54 of 395 models

    Choose this model if you want to keep the electricity used for hot water as low as possible.

  8. Oekoboiler ZG 02-05 300l
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    Oekoboiler ZG 02-05 300l

    Water heating efficiency ηwh 206 %

    • Water heating efficiency ηwh 206 %: no. 7 of 450 models
    • Indoor sound power 46 dB(A): no. 54 of 395 models

    Choose this model if you want to keep the electricity used for hot water as low as possible.

  9. Zestar HS04V-Q

    Water heating efficiency ηwh 195 %

    • Water heating efficiency ηwh 195 %: no. 9 of 450 models

    Choose this model if you want to keep the electricity used for hot water as low as possible.

  10. Zestar HS06V-Q

    Water heating efficiency ηwh 195 %

    • Water heating efficiency ηwh 195 %: no. 9 of 450 models

    Choose this model if you want to keep the electricity used for hot water as low as possible.

  11. Zestar HS10V-Q

    Water heating efficiency ηwh 192 %

    • Water heating efficiency ηwh 192 %: no. 11 of 450 models

    Choose this model if you want to keep the electricity used for hot water as low as possible.

  12. Zestar HS12V-Q

    Water heating efficiency ηwh 192 %

    • Water heating efficiency ηwh 192 %: no. 11 of 450 models

    Choose this model if you want to keep the electricity used for hot water as low as possible.

  13. Zestar HS08V-Q

    Water heating efficiency ηwh 186 %

    • Water heating efficiency ηwh 186 %: no. 13 of 450 models

    Choose this model if you want to keep the electricity used for hot water as low as possible.

  14. Migloor PAVH-15V4FBA

    Water heating efficiency ηwh 185 %

    • Water heating efficiency ηwh 185 %: no. 14 of 450 models
    • Indoor sound power 40 dB(A): no. 15 of 395 models

    Choose this model if you want to keep the electricity used for hot water as low as possible.

  15. Eco Hot Water 01-05 350l

    Water heating efficiency ηwh 181 %

    • Water heating efficiency ηwh 181 %: no. 15 of 450 models

    Choose this model if you want to keep the electricity used for hot water as low as possible.

  16. Oekoboiler ZG 02-05 350l
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    Oekoboiler ZG 02-05 350l

    Water heating efficiency ηwh 181 %

    • Water heating efficiency ηwh 181 %: no. 15 of 450 models

    Choose this model if you want to keep the electricity used for hot water as low as possible.

  17. Dimplex Edel 200 Water - Water D893332

    Water heating efficiency ηwh 179 %

    • Water heating efficiency ηwh 179 %: no. 17 of 450 models
    • Indoor sound power 44 dB(A): no. 38 of 395 models

    Choose this model if you want to keep the electricity used for hot water as low as possible.

  18. intuis 352231 - Edel 150 EAU /3

    Water heating efficiency ηwh 179 %

    • Water heating efficiency ηwh 179 %: no. 17 of 450 models
    • Indoor sound power 44 dB(A): no. 38 of 395 models

    Choose this model if you want to keep the electricity used for hot water as low as possible.

  19. intuis 352431 - Edel 270 EAU /3

    Water heating efficiency ηwh 179 %

    • Water heating efficiency ηwh 179 %: no. 17 of 450 models
    • Indoor sound power 44 dB(A): no. 38 of 395 models

    Choose this model if you want to keep the electricity used for hot water as low as possible.

  20. Tiki DHW W 300

    Water heating efficiency ηwh 179 %

    • Water heating efficiency ηwh 179 %: no. 17 of 450 models
    • Indoor sound power 41 dB(A): no. 21 of 395 models

    Choose this model if you want to keep the electricity used for hot water as low as possible.

  21. SOLIUS QSWHA160L

    Water heating efficiency ηwh 178 %

    • Water heating efficiency ηwh 178 %: no. 21 of 450 models

    Choose this model if you want to keep the electricity used for hot water as low as possible.

  22. STIEBEL ELTRON SHP-I 300 H Plus
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    STIEBEL ELTRON SHP-I 300 H Plus

    Water heating efficiency ηwh 177 %

    • Water heating efficiency ηwh 177 %: no. 22 of 450 models
    • Weaker point: Indoor sound power 59 dB(A): no. 364 of 395 models

    Choose this model if you want to keep the electricity used for hot water as low as possible.

  23. Ochsner EUROPA N 200 CA

    Water heating efficiency ηwh 176 %

    • Water heating efficiency ηwh 176 %: no. 23 of 450 models
    • Weaker point: Indoor sound power 59 dB(A): no. 364 of 395 models

    Choose this model if you want to keep the electricity used for hot water as low as possible.

  24. STIEBEL ELTRON SHP-I 200 Plus
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    STIEBEL ELTRON SHP-I 200 Plus

    Water heating efficiency ηwh 176 %

    • Water heating efficiency ηwh 176 %: no. 23 of 450 models
    • Weaker point: Indoor sound power 57 dB(A): no. 326 of 395 models

    Choose this model if you want to keep the electricity used for hot water as low as possible.

  25. STIEBEL ELTRON SHP-O 200 Plus
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    STIEBEL ELTRON SHP-O 200 Plus

    Water heating efficiency ηwh 176 %

    • Water heating efficiency ηwh 176 %: no. 23 of 450 models
    • Weaker point: Indoor sound power 59 dB(A): no. 364 of 395 models

    Choose this model if you want to keep the electricity used for hot water as low as possible.

All figures at a glance

#Model1Water heating efficiency ηwhLoad profileEnergy labelAnnual electricity use (average climate)Indoor sound power
1ENERGIE AQUAPURA BOOSTER 200I226 %LA+556 kWh45 dB(A)
2ENERGIE AQUAPURA BOOSTER 300I226 %XLA+833 kWh45 dB(A)
3Eco Hot Water 01-05 150l225 %LA+–46 dB(A)
4Oekoboiler ZG 02-05 150l225 %LA+–46 dB(A)
5Eco Hot Water 01-05 200l215 %LA+–46 dB(A)
6Oekoboiler ZG 02-05 200l215 %LA+–46 dB(A)
7Eco Hot Water 01-05 300l206 %XLA+–46 dB(A)
8Oekoboiler ZG 02-05 300l206 %XLA+–46 dB(A)
9Zestar HS04V-Q195 %MA+––
10Zestar HS06V-Q195 %LA+––
11Zestar HS10V-Q192 %LA+––
12Zestar HS12V-Q192 %XLA+––
13Zestar HS08V-Q186 %LA+––
14Migloor PAVH-15V4FBA185 %XLA+–40 dB(A)
15Eco Hot Water 01-05 350l181 %XXLA+–50 dB(A)
16Oekoboiler ZG 02-05 350l181 %XXLA+–50 dB(A)
17Dimplex Edel 200 Water - Water D893332179 %MA+–44 dB(A)
18intuis 352231 - Edel 150 EAU /3179 %MA+–44 dB(A)
19intuis 352431 - Edel 270 EAU /3179 %LA+–44 dB(A)
20Tiki DHW W 300179 %XLA+–41 dB(A)
21SOLIUS QSWHA160L178 %LA+––
22STIEBEL ELTRON SHP-I 300 H Plus177 %XLA+–59 dB(A)
23Ochsner EUROPA N 200 CA176 %LA+–59 dB(A)
24STIEBEL ELTRON SHP-I 200 Plus176 %LA+–57 dB(A)
25STIEBEL ELTRON SHP-O 200 Plus176 %LA+–59 dB(A)

Compare all models →

How this ranking is made

This selection is put together automatically from the 450 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: Water heating efficiency ηwh (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) – water heaters — Europese Commissie · accessed Oct 13, 2026