Photo: Ariston
Hot waterR290
Ariston Nuos Plus S2 Wi-Fi
Hot water heat pumps · 3 models · PL
Wall-hung R290 hot water heat pump with an 80, 110 or 150 l tank, up to 60 degrees C with the heat pump and 75 degrees C with the electric heater. Sound power is the indoor value from the manual. The manual documents two signal inputs that take either HC-HP and PV signals or the two SG Ready signals.
Grant lists
Grants depend on the exact model being on the official list. The counts below are the entries of this series we found in each list.
BAFA WEP (Germany)
No model on the list
No model of this series is in the BAFA Wärmeerzeuger-Portal, so it cannot be funded under the German BEG grant.
checked November 4, 2026
ZUM (Poland)
No model on the list
No model of this series is on the Lista ZUM, so it cannot be funded under Czyste Powietrze.
checked November 4, 2026
Specifications
| Type | Hot water heat pumps |
|---|---|
| SCOP at 35 °C | – |
| SCOP at 55 °C | – |
| Refrigerant | R290 (GWP 3) |
| Outdoor sound power | 45 dB(A) |
| Max. flow temperature | 60 °C |
| Markets | PL |
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.
Control and connectivity
| SG Ready | Yes |
|---|---|
| Modbus | Not documented |
| EEBUS | Not documented |
| Cloud API | not confirmed (Ariston NET) – Wi-Fi built in |
| §14a EnWG control | not confirmed |
| Local interfaces | SG Ready, relay input |
Source: www.ariston.com/content/dam/ariston/pl/products/heat-pump...
Zerofy
Via SG ReadyZerofy has no native Ariston integration yet, but this series has an SG Ready input: Zerofy can switch it through a Shelly relay on the SG Ready terminals.
Models in this series
Model codes as the manufacturer documents them. The official list entries, with their own naming, follow below.
More Ariston heat pumps
Sources
- Product page: www.ariston.com/pl-pl/produkty/pompy-ciepla/cwu/nuos-plus-s2-wi-fi-pl
- Control and connectivity: www.ariston.com/content/dam/ariston/pl/products/heat-pumps/hot-water-heat-pum...
- BAFA Wärmeerzeuger-Portal – Wärmepumpen – checked November 4, 2026
- Lista ZUM (Instytut Ochrony Środowiska) – checked November 4, 2026
- EEBUS certified devices – checked November 2, 2026
All figures are taken from the manufacturers' datasheets and the official BAFA and ZUM lists on the date shown and may have changed since. This is not grant advice – check the list and your grant conditions before you order. Zerofy is not affiliated with any of the manufacturers listed.
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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