LAMBDA Wärmepumpen heat pumps

Air/water monobloc 2 series

LAMBDA Wärmepumpen GmbH is an Austrian heat pump maker based in Kirchbichl, Tyrol, with sites in Euskirchen and Hünfeld in Germany; the Swiss Huggler Gebäudetechnik has joined the Lambda group. It builds one product line: the EUREKA EU-L air-to-water monoblocks with R290, which use Lambda's patented "3K process" evaporator, reach flow temperatures up to 70 °C and come in 10, 13, 15 and 20 kW sizes plus the larger EUREKA Magna EU35L. The controller exposes a documented Modbus TCP/RTU interface and is maintained remotely through Lambda's Connected Heat platform.

Checked November 2, 2026 · Kirchbichl, Austria · Manufacturer website · Datasheet library

LAMBDA Wärmepumpen EUREKA EU-L (EU10L to EU20L)

Photo: LAMBDA Wärmepumpen

Grant lists

BAFA WEP (Germany)

2 / 2 checked November 4, 2026

ZUM (Poland)

0 / 2 checked November 4, 2026

LAMBDA Wärmepumpen in Zerofy

Zerofy has no integration for LAMBDA Wärmepumpen 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.

LAMBDA Wärmepumpen heat pump types

Air-to-water monoblock2

LAMBDA Wärmepumpen 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

LAMBDA Wärmepumpen EUREKA EU-L (EU10L to EU20L)

4 models

Output
9.7–20 kW
SCOP 35 °C
5.68–6.1
Max. flow
70 °C
BAFA WEP
4 models listed
ZUM
No model on the list
Zerofy
Via SG Ready
Details and listed models

Air/water monoblocR290

LAMBDA Wärmepumpen EUREKA Magna EU35L

1 model

Output
32 kW
SCOP 35 °C
6.06
Max. flow
70 °C
BAFA WEP
1 model listed
ZUM
No model on the list
Zerofy
Via SG Ready
Details and listed models

LAMBDA Wärmepumpen series at a glance

Series Type Output SCOP 35 °C SCOP 55 °C Refrigerant Max. flow BAFA WEP ZUM SG Ready Modbus EEBUS
EUREKA EU-L (EU10L to EU20L) Air/water monobloc 9.7–20 kW 5.68–6.1 4.44–4.58 R290 70 °C 4 models listed No model on the list Yes Yes –Not documented
EUREKA Magna EU35L Air/water monobloc 32 kW 6.06 4.55 R290 70 °C 1 model listed No model on the list Yes Yes –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:

  1. www.lambda-wp.com/
  2. www.lambda-wp.com/services/downloads/
  3. www.lambda-wp.com/unternehmen/standorte/
  4. www.lambda-wp.com/news/detail/lambda-waermepumpen-staerkt-praesenz-in-der-schweiz-huggl...
  5. www.lambda-wp.com/fileadmin/userdaten/docs/downloads/eu-l_serie/DE_Bedienung_Montage_EU...
  6. www.lambda-wp.com/fileadmin/userdaten/docs/downloads/regler/1_0_0_Modbusprotokoll_2026.pdf
  7. elan1.bafa.bund.de/zvi-ui/wep/waermepumpen
  8. lista-zum.ios.edu.pl/
  9. BAFA Wärmeerzeuger-Portal – Wärmepumpen – checked November 4, 2026
  10. Lista ZUM (Instytut Ochrony Środowiska) – checked November 4, 2026
  11. 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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