Quietest heat pump water heaters (indoors, 2026)
395 models in our database meet this; below the first 25 in order.
Criteria:
- Sorted by: Indoor sound power (lowest 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
ALDES B100_TFlow® Nano MP / B100_TFlow® Nano MP Connecté / B100 T.Flow® Nano UBA
Indoor sound power 33 dB(A)
- Indoor sound power 33 dB(A): the best of 395 models in this selection
- Outdoor sound power 33 dB(A): the best of 241 models in this selection
Choose this model if the indoor unit goes in a bedroom, living room or another quiet space.
ALDES B200_TFlow® Hygro+ MP / B200_TFlow® Hygro+ MP Connecté / B200 T.Flow® Hygro+ UBA
Indoor sound power 34 dB(A)
- Indoor sound power 34 dB(A): no. 2 of 395 models
- Outdoor sound power 34 dB(A): no. 2 of 241 models
Choose this model if the indoor unit goes in a bedroom, living room or another quiet space.
R-Aqua HPB 100
Indoor sound power 35 dB(A)
- Indoor sound power 35 dB(A): no. 3 of 395 models
- Weaker point: Water heating efficiency ηwh 110 %: no. 407 of 450 models
Choose this model if the indoor unit goes in a bedroom, living room or another quiet space.
R-Aqua HPB 300A
Indoor sound power 35 dB(A)
- Indoor sound power 35 dB(A): no. 3 of 395 models
Choose this model if the indoor unit goes in a bedroom, living room or another quiet space.
Image: ATLANTICrequest removal ATLANTIC 234511
Indoor sound power 37 dB(A)
- Indoor sound power 37 dB(A): no. 5 of 395 models
- Outdoor sound power 43 dB(A): no. 14 of 241 models
- Weaker point: Water heating efficiency ηwh 113 %: no. 387 of 450 models
Choose this model if the indoor unit goes in a bedroom, living room or another quiet space.
Image: ATLANTICrequest removal ATLANTIC 234512
Indoor sound power 37 dB(A)
- Indoor sound power 37 dB(A): no. 5 of 395 models
- Outdoor sound power 43 dB(A): no. 14 of 241 models
Choose this model if the indoor unit goes in a bedroom, living room or another quiet space.
AUSTRIA EMAIL 964053
Indoor sound power 37 dB(A)
- Indoor sound power 37 dB(A): no. 5 of 395 models
- Outdoor sound power 43 dB(A): no. 14 of 241 models
- Weaker point: Water heating efficiency ηwh 113 %: no. 387 of 450 models
Choose this model if the indoor unit goes in a bedroom, living room or another quiet space.
Itho Daalderop WPU 6G 18-E M + 150L
Indoor sound power 37 dB(A)
- Indoor sound power 37 dB(A): no. 5 of 395 models
- Water heating efficiency ηwh 154 %: no. 68 of 450 models
Choose this model if the indoor unit goes in a bedroom, living room or another quiet space.
NONAME 964052
Indoor sound power 37 dB(A)
- Indoor sound power 37 dB(A): no. 5 of 395 models
- Outdoor sound power 43 dB(A): no. 14 of 241 models
- Weaker point: Water heating efficiency ηwh 113 %: no. 387 of 450 models
Choose this model if the indoor unit goes in a bedroom, living room or another quiet space.
Image: THERMORrequest removal THERMOR 296112
Indoor sound power 37 dB(A)
- Indoor sound power 37 dB(A): no. 5 of 395 models
- Outdoor sound power 43 dB(A): no. 14 of 241 models
Choose this model if the indoor unit goes in a bedroom, living room or another quiet space.
Wertec W12-100
Indoor sound power 37 dB(A)
- Indoor sound power 37 dB(A): no. 5 of 395 models
- Weaker point: Water heating efficiency ηwh 110 %: no. 407 of 450 models
Choose this model if the indoor unit goes in a bedroom, living room or another quiet space.
Electranova YT-060GH
Indoor sound power 38 dB(A)
- Indoor sound power 38 dB(A): no. 12 of 395 models
- Weaker point: Water heating efficiency ηwh 75 %: no. 448 of 450 models
Choose this model if the indoor unit goes in a bedroom, living room or another quiet space.
HGB-Trading House Heating HH-060GV
Indoor sound power 38 dB(A)
- Indoor sound power 38 dB(A): no. 12 of 395 models
- Weaker point: Water heating efficiency ηwh 75 %: no. 448 of 450 models
Choose this model if the indoor unit goes in a bedroom, living room or another quiet space.
R-Aqua HPB 200A
Indoor sound power 38 dB(A)
- Indoor sound power 38 dB(A): no. 12 of 395 models
Choose this model if the indoor unit goes in a bedroom, living room or another quiet space.
Image: ATLANTICrequest removal ATLANTIC 350201
Indoor sound power 40 dB(A)
- Indoor sound power 40 dB(A): no. 15 of 395 models
- Weaker point: Water heating efficiency ηwh 116 %: no. 364 of 450 models
Choose this model if the indoor unit goes in a bedroom, living room or another quiet space.
Image: ATLANTICrequest removal ATLANTIC 350202
Indoor sound power 40 dB(A)
- Indoor sound power 40 dB(A): no. 15 of 395 models
Choose this model if the indoor unit goes in a bedroom, living room or another quiet space.
Migloor PAVH-15V4FBA
Indoor sound power 40 dB(A)
- Water heating efficiency ηwh 185 %: no. 14 of 450 models
- Indoor sound power 40 dB(A): no. 15 of 395 models
- Weaker point: Outdoor sound power 61 dB(A): no. 208 of 241 models
Choose this model if the indoor unit goes in a bedroom, living room or another quiet space.
OUTES AAb21R1/200ES
Indoor sound power 40 dB(A)
- Indoor sound power 40 dB(A): no. 15 of 395 models
- Water heating efficiency ηwh 145 %: no. 94 of 450 models
Choose this model if the indoor unit goes in a bedroom, living room or another quiet space.
OUTES AAb21R1/300ES
Indoor sound power 40 dB(A)
- Indoor sound power 40 dB(A): no. 15 of 395 models
Choose this model if the indoor unit goes in a bedroom, living room or another quiet space.
SOLIUS ECOTANK SILVER DUPLEX 500L C/ SERPENTINA - SWD500S
Indoor sound power 40 dB(A)
- Indoor sound power 40 dB(A): no. 15 of 395 models
Choose this model if the indoor unit goes in a bedroom, living room or another quiet space.
CABEL 964055
Indoor sound power 41 dB(A)
- Indoor sound power 41 dB(A): no. 21 of 395 models
- Outdoor sound power 43 dB(A): no. 14 of 241 models
- Weaker point: Water heating efficiency ηwh 113 %: no. 387 of 450 models
Choose this model if the indoor unit goes in a bedroom, living room or another quiet space.
CABEL 974053
Indoor sound power 41 dB(A)
- Indoor sound power 41 dB(A): no. 21 of 395 models
- Outdoor sound power 43 dB(A): no. 14 of 241 models
Choose this model if the indoor unit goes in a bedroom, living room or another quiet space.
Image: Dimplexrequest removal Dimplex Edel 100 Air D893321
Indoor sound power 41 dB(A)
- Indoor sound power 41 dB(A): no. 21 of 395 models
- Weaker point: Water heating efficiency ηwh 99 %: no. 439 of 450 models
Choose this model if the indoor unit goes in a bedroom, living room or another quiet space.
Itho Daalderop 03-00609 WPU 25COE-5G + 03-00549 WPV 200 2G
Indoor sound power 41 dB(A)
- Indoor sound power 41 dB(A): no. 21 of 395 models
- Water heating efficiency ηwh 160 %: no. 61 of 450 models
Choose this model if the indoor unit goes in a bedroom, living room or another quiet space.
Sanistage DSW200W
Indoor sound power 41 dB(A)
- Indoor sound power 41 dB(A): no. 21 of 395 models
- Water heating efficiency ηwh 166 %: no. 40 of 450 models
Choose this model if the indoor unit goes in a bedroom, living room or another quiet space.
All figures at a glance
| # | Model1 | Indoor sound power | Load profile | Water heating efficiency ηwh | Energy label | Outdoor sound power |
|---|---|---|---|---|---|---|
| 1 | ALDES B100_TFlow® Nano MP / B100_TFlow® Nano MP Connecté / B100 T.Flow® Nano UBA | 33 dB(A) | M | 141 % | A+ | 33 dB(A) |
| 2 | ALDES B200_TFlow® Hygro+ MP / B200_TFlow® Hygro+ MP Connecté / B200 T.Flow® Hygro+ UBA | 34 dB(A) | M | 146 % | A+ | 34 dB(A) |
| 3 | R-Aqua HPB 100 | 35 dB(A) | M | 110 % | A+ | 50 dB(A) |
| 4 | R-Aqua HPB 300A | 35 dB(A) | XL | 142 % | A+ | 50 dB(A) |
| 5 | ATLANTIC 234511 | 37 dB(A) | M | 113 % | A+ | 43 dB(A) |
| 6 | ATLANTIC 234512 | 37 dB(A) | L | 131 % | A+ | 43 dB(A) |
| 7 | AUSTRIA EMAIL 964053 | 37 dB(A) | M | 113 % | A+ | 43 dB(A) |
| 8 | Itho Daalderop WPU 6G 18-E M + 150L | 37 dB(A) | L | 154 % | A+ | – |
| 9 | NONAME 964052 | 37 dB(A) | M | 113 % | A+ | 43 dB(A) |
| 10 | THERMOR 296112 | 37 dB(A) | L | 131 % | A+ | 43 dB(A) |
| 11 | Wertec W12-100 | 37 dB(A) | M | 110 % | A+ | – |
| 12 | Electranova YT-060GH | 38 dB(A) | S | 75 % | A+ | – |
| 13 | HGB-Trading House Heating HH-060GV | 38 dB(A) | S | 75 % | A+ | – |
| 14 | R-Aqua HPB 200A | 38 dB(A) | L | 129 % | A+ | 53 dB(A) |
| 15 | ATLANTIC 350201 | 40 dB(A) | M | 116 % | A+ | 52 dB(A) |
| 16 | ATLANTIC 350202 | 40 dB(A) | L | 133 % | A+ | 52 dB(A) |
| 17 | Migloor PAVH-15V4FBA | 40 dB(A) | XL | 185 % | A+ | 61 dB(A) |
| 18 | OUTES AAb21R1/200ES | 40 dB(A) | L | 145 % | A+ | – |
| 19 | OUTES AAb21R1/300ES | 40 dB(A) | XL | 137 % | A+ | – |
| 20 | SOLIUS ECOTANK SILVER DUPLEX 500L C/ SERPENTINA - SWD500S | 40 dB(A) | XXL | 143 % | A+ | – |
| 21 | CABEL 964055 | 41 dB(A) | M | 113 % | A+ | 43 dB(A) |
| 22 | CABEL 974053 | 41 dB(A) | L | 131 % | A+ | 43 dB(A) |
| 23 | Dimplex Edel 100 Air D893321 | 41 dB(A) | M | 99 % | A | 56 dB(A) |
| 24 | Itho Daalderop 03-00609 WPU 25COE-5G + 03-00549 WPV 200 2G | 41 dB(A) | XL | 160 % | A+ | – |
| 25 | Sanistage DSW200W | 41 dB(A) | L | 166 % | A+ | – |
How this ranking is made
This selection is put together automatically from the 395 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: Indoor sound power (lowest 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
- European Product Registry for Energy Labelling (EPREL) – water heaters — Europese Commissie · accessed 13 Oct 2026