Vaillant heat pumps
Air/water monoblocAir/water splitGround sourceHot water 10 series
Vaillant is a German heating manufacturer founded in Remscheid in 1874 and today part of the family-owned Vaillant Group. Its heat pump range covers air-to-water monoblock and split units (aroTHERM plus, perform, pro, split, split plus), brine-to-water and water-to-water units (flexoTHERM exclusive, geoCOMPACT exclusive) and the aroSTOR plus hot water heat pump.
Checked November 2, 2026 · Remscheid, Germany, founded 1874 · Manufacturer website
Photo: Vaillant
Grant lists
BAFA WEP (Germany)
8 / 10 checked November 4, 2026
ZUM (Poland)
7 / 10 checked November 4, 2026
Vaillant in Zerofy
BetaZerofy reads Vaillant heat pumps through the manufacturer's cloud (myVAILLANT), with the account the heat pump is already registered with. Autopilot then moves heat into the building and the hot water tank when your own solar power is available or the electricity price is low.
What Zerofy can do with it:
Heating statusHot water statusHot water boostRoom temperatureFlow temperatureSolar AutopilotSmart Autopilot (tariff-optimised heating)
Vaillant heat pump types
Vaillant Air-to-water monoblock
The whole refrigerant circuit sits in one outdoor unit; only water pipes run into the house. The most common choice for retrofits, because no refrigerant lines need to be installed inside.
Air/water monoblocR290
Vaillant aroTHERM plus
10 models
- Output
- 3–12 kW
- SCOP 35 °C
- 4.43–5.13
- Max. flow
- 75 °C
- BAFA WEP
- 10 models listed
- ZUM
- 4 models listed
- Zerofy
- Native
Air/water monoblocR290
Vaillant aroTHERM pro
3 models
- Output
- 5–11 kW
- SCOP 35 °C
- 4.87–5.01
- Max. flow
- –
- BAFA WEP
- 3 models listed
- ZUM
- 3 models listed
- Zerofy
- Native
Air/water monoblocR290
Vaillant aroTHERM perform
2 models
- Output
- 14.1–17.7 kW
- SCOP 35 °C
- 5.37–5.41
- Max. flow
- 75 °C
- BAFA WEP
- 2 models listed
- ZUM
- No model on the list
- Zerofy
- Native
Vaillant Air-to-water split
An outdoor unit plus an indoor hydraulic station, joined by refrigerant lines. The pipework inside the house stays frost-free without glycol, and the indoor part is often quieter to place.
Air/water splitR32
Vaillant aroTHERM split plus
7 models
- Output
- 3–7 kW
- SCOP 35 °C
- 4.63–5.06
- Max. flow
- –
- BAFA WEP
- 10 models listed
- ZUM
- 12 models listed
- Zerofy
- Native
Air/water splitR410A
Vaillant aroTHERM split
7 models
- Output
- 10–12 kW
- SCOP 35 °C
- 4.35–4.6
- Max. flow
- 55 °C
- BAFA WEP
- 10 models listed
- ZUM
- 12 models listed
- Zerofy
- Native
Air/water splitR32
Vaillant aroTHERM pure
6 models
- Output
- –
- SCOP 35 °C
- –
- Max. flow
- –
- BAFA WEP
- No model on the list
- ZUM
- 16 models listed
- Zerofy
- Native
Vaillant Ground-source (brine/water)
Draws heat from a borehole or ground loop, so the source stays at a steady temperature all winter. Higher efficiency and no outdoor noise, but boreholes cost money and need a permit.
Ground sourceR410A
Vaillant flexoTHERM exclusive
5 models
- Output
- 5.3–19.6 kW
- SCOP 35 °C
- 4.88–5.26
- Max. flow
- 65 °C
- BAFA WEP
- 4 models listed
- ZUM
- 5 models listed
- Zerofy
- Native
Ground sourceR410A
Vaillant flexoCOMPACT exclusive
3 models
- Output
- 5.3–11.2 kW
- SCOP 35 °C
- 5.22–5.26
- Max. flow
- 65 °C
- BAFA WEP
- 2 models listed
- ZUM
- 3 models listed
- Zerofy
- Native
Ground sourceR290
Vaillant geoCOMPACT exclusive
1 model
- Output
- 5 kW
- SCOP 35 °C
- 5.59
- Max. flow
- –
- BAFA WEP
- 1 model listed
- ZUM
- No model on the list
- Zerofy
- Native
Vaillant Hot water heat pumps
A small heat pump built onto a hot water tank. It heats drinking water only and is a good way to turn surplus solar into stored heat – or to add hot water to a house that is otherwise heated differently.
Hot waterR290
Vaillant aroSTOR plus
4 models
- Output
- –
- SCOP 35 °C
- –
- Max. flow
- –
- BAFA WEP
- Not confirmed
- ZUM
- Not confirmed
- Zerofy
- Native
Vaillant series at a glance
| Series | Type | Output | SCOP 35 °C | SCOP 55 °C | Refrigerant | Max. flow | BAFA WEP | ZUM | SG Ready | Modbus | EEBUS |
|---|---|---|---|---|---|---|---|---|---|---|---|
| aroTHERM plus | Air/water monobloc | 3–12 kW | 4.43–5.13 | 3.3–3.85 | R290 | 75 °C | 10 models listed | 4 models listed | Yes | –Not documented | Yes |
| aroTHERM pro | Air/water monobloc | 5–11 kW | 4.87–5.01 | 3.63–3.7 | R290 | – | 3 models listed | 3 models listed | Yes | –Not documented | Yes |
| aroTHERM perform | Air/water monobloc | 14.1–17.7 kW* | 5.37–5.41 | 4–4.1 | R290 | 75 °C | 2 models listed | No model on the list | Yes | –Not documented | Yes |
| aroTHERM split plus | Air/water split | 3–7 kW | 4.63–5.06 | 3.23–3.58 | R32 | – | 10 models listed | 12 models listed | Yes | –Not documented | –Not documented |
| aroTHERM split | Air/water split | 10–12 kW | 4.35–4.6 | 3.25–3.43 | R410A | 55 °C | 10 models listed | 12 models listed | Yes | –Not documented | –Not documented |
| aroTHERM pure | Air/water split | – | – | – | R32 | – | No model on the list | 16 models listed | ?Not confirmed | ?Not confirmed | ?Not confirmed |
| flexoTHERM exclusive | Ground source | 5.3–19.6 kW | 4.88–5.26 | 3.75–3.88 | R410A | 65 °C | 4 models listed | 5 models listed | Yes | –Not documented | Yes |
| flexoCOMPACT exclusive | Ground source | 5.3–11.2 kW | 5.22–5.26 | 3.75–3.88 | R410A | 65 °C | 2 models listed | 3 models listed | Yes | –Not documented | Yes |
| geoCOMPACT exclusive | Ground source | 5 kW | 5.59 | 4.08 | R290 | – | 1 model listed | No model on the list | Yes | –Not documented | Yes |
| aroSTOR plus | Hot water | – | – | – | R290 | – | Not confirmed | Not confirmed | –Not documented | –Not documented | –Not documented |
Heating output is the figure in the manufacturer's datasheet; the basis (nominal output at A7/W35 or B0/W35, or design heat load) differs between brands, so check the datasheet before comparing. * = design heat load Pdesignh at 35 °C from the BAFA portal.
Sources
Specifications come from the manufacturer's datasheets linked above, grant status from the official lists below, checked November 2, 2026:
- www.vaillant.de/produkte/waermepumpen/
- www.vaillant-group.com/unser-unternehmen/historie/
- www.vaillant.de/ratgeber/heizung-im-smart-home/smarte-schnittstellen/
- www.vaillant.de/ratgeber/heizung-im-smart-home/iqconnect/
- www.vaillant.pl/produkty/arotherm-pure/
- elan1.bafa.bund.de/zvi-ui/wep/waermepumpen
- BAFA Wärmeerzeuger-Portal – Wärmepumpen – checked November 4, 2026
- Lista ZUM (Instytut Ochrony Środowiska) – checked November 4, 2026
- EEBUS certified devices – checked November 2, 2026
SG Ready is a label of the Bundesverband Wärmepumpe (BWP) e.V.; “Yes” means the manufacturer documents the two-input interface or declares it on the BAFA portal, not that the series carries the BWP label – the label list is at waermepumpe.de. EEBUS is a standard of the EEBus Initiative e.V.; Modbus is a registered trademark of Schneider Electric, licensed to the Modbus Organization. Product names, logos and photos belong to their manufacturers and are shown to identify the products. Grant data: BAFA Wärmeerzeuger-Portal and Lista ZUM (IOŚ-PIB) as of the dates shown; the SCOP at 55 °C in the BAFA tables is calculated by Zerofy from the portal's ηs value.
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