De Dietrich heat pumps

Air/water monoblocAir/water splitGround sourceHot water 8 series

De Dietrich is a French heating brand from Mertzwiller in Alsace, run by BDR Thermea France and part of BDR Thermea Group together with Remeha and Baxi. Its heat pumps are sold mainly in France and, through BDR Thermea Poland, in Poland: the Alezio M R290 / Alezio M 3R EU and Alezio M R32 monoblocks, the Alezio S R32 and HPI-S splits, the Strateo R32 split with a built-in hot water tank, the GSHP ground source units and the Elensio hot water heat pump. Most are shared group platforms: Alezio M R290 is the Remeha Confida MB 400 and Baxi Auriga P, Alezio M R32 (Modena in Poland) is the Remeha Tensio C and Baxi Auriga, and the Strateo R32 outdoor unit is the one in the Remeha Mercuria Ace / Eria Tower Ace and Baxi Platinum BC Smart iR32.

Checked November 2, 2026 · Mertzwiller, France · Manufacturer website

De Dietrich Alezio M R290 / Alezio M 3R EU

Photo: De Dietrich

Grant lists

BAFA WEP (Germany)

0 / 8 checked November 4, 2026

ZUM (Poland)

8 / 8 checked November 4, 2026

De Dietrich in Zerofy

Zerofy has no integration for De Dietrich yet. Where a series below has an SG Ready input, Zerofy can still switch it through a Shelly relay. The heat pump comparison lists every brand Zerofy supports.

De Dietrich heat pump types

Air-to-water monoblock2 Air-to-water split4 Ground-source (brine/water)1 Hot water heat pumps1

De Dietrich 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

De Dietrich Alezio M R290 / Alezio M 3R EU

14 models

Output
4.4–13.5 kW
SCOP 35 °C
4.7–5.34
Max. flow
75 °C
BAFA WEP
No model on the list
ZUM
10 models listed
Zerofy
Not supported
Details and listed models

Air/water monoblocR32

De Dietrich Alezio M R32 / Modena

14 models

Output
4.2–15.9 kW
SCOP 35 °C
4.62–5.22
Max. flow
60 °C
BAFA WEP
No model on the list
ZUM
6 models listed
Zerofy
Not supported
Details and listed models

De Dietrich 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

De Dietrich Alezio S R32

13 models

Output
4.3–16 kW
SCOP 35 °C
4.5–5.21
Max. flow
65 °C
BAFA WEP
No model on the list
ZUM
12 models listed
Zerofy
Via SG Ready
Details and listed models

Air/water splitR32

De Dietrich Strateo R32

7 models

Output
6.4–7.6 kW
SCOP 35 °C
4.04–4.5
Max. flow
60 °C
BAFA WEP
No model on the list
ZUM
3 models listed
Zerofy
Not supported
Details and listed models

Air/water splitR410A

De Dietrich HPI-S

10 models

Output
4.6–24.4 kW
SCOP 35 °C
3.86–4.8
Max. flow
–
BAFA WEP
No model on the list
ZUM
6 models listed
Zerofy
Not supported
Details and listed models

Air/water split

De Dietrich Alezio S / Alezio S V200 (previous generation)

12 models

Output
–
SCOP 35 °C
–
Max. flow
–
BAFA WEP
No model on the list
ZUM
20 models listed
Zerofy
Not supported
Details and listed models

De Dietrich 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 source

De Dietrich GSHP

11 models

Output
–
SCOP 35 °C
–
Max. flow
–
BAFA WEP
No model on the list
ZUM
9 models listed
Zerofy
Not supported
Details and listed models

De Dietrich 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

De Dietrich Elensio

4 models

Output
–
SCOP 35 °C
–
Max. flow
–
BAFA WEP
Not confirmed
ZUM
4 models listed
Zerofy
Not supported
Details and listed models

De Dietrich series at a glance

Series Type Output SCOP 35 °C SCOP 55 °C Refrigerant Max. flow BAFA WEP ZUM SG Ready Modbus EEBUS
Alezio M R290 / Alezio M 3R EU Air/water monobloc 4.4–13.5 kW 4.7–5.34 3.73–3.99 R290 75 °C No model on the list 10 models listed –Not documented Yes –Not documented
Alezio M R32 / Modena Air/water monobloc 4.2–15.9 kW 4.62–5.22 3.31–3.52 R32 60 °C No model on the list 6 models listed –Not documented Yes –Not documented
Alezio S R32 Air/water split 4.3–16 kW 4.5–5.21 3.58–3.67 R32 65 °C No model on the list 12 models listed Yes –Not documented –Not documented
Strateo R32 Air/water split 6.4–7.6 kW 4.04–4.5 2.99–3.37 R32 60 °C No model on the list 3 models listed ?Not confirmed ?Not confirmed ?Not confirmed
HPI-S Air/water split 4.6–24.4 kW 3.86–4.8 2.87–3.42 R410A – No model on the list 6 models listed ?Not confirmed ?Not confirmed ?Not confirmed
Alezio S / Alezio S V200 (previous generation) Air/water split – – – – – No model on the list 20 models listed ?Not confirmed ?Not confirmed ?Not confirmed
GSHP Ground source – – – – – No model on the list 9 models listed ?Not confirmed ?Not confirmed ?Not confirmed
Elensio Hot water – – – R290 – Not confirmed 4 models listed ?Not confirmed ?Not confirmed ?Not confirmed

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:

  1. www.dedietrich-thermique.fr/nos-produits/pompe-a-chaleur
  2. dedietrich.pl/produkty/technika-dla-domu/pompy-ciepla/
  3. dedietrich.pl/produkty/technika-dla-domu/pompy-ciepla/alezio-m-r290/
  4. dedietrich.pl/produkty/technika-dla-domu/pompy-ciepla/alezio-s-r32/
  5. dedietrich.pl/produkty/technika-dla-domu/archiwum/modena/
  6. dedietrich.pl/produkty/technika-dla-domu/archiwum/strateo-r32/
  7. dedietrich.pl/produkty/technika-dla-domu/pompy-ciepla/hpi-s/
  8. lista-zum.ios.edu.pl/
  9. elan1.bafa.bund.de/zvi-ui/wep/waermepumpen
  10. BAFA Wärmeerzeuger-Portal – Wärmepumpen – checked November 4, 2026
  11. Lista ZUM (Instytut Ochrony Środowiska) – checked November 4, 2026
  12. 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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