Energy Storage – Efficient Heat & Energy Management - Lambda Wärmepumpen

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Our EUREKA series heat pumps combine maximum efficiency with modern design. With capacities ranging from 10 kW for small single-family homes to 20 kW for multi-family
buildings, we offer the right models—for both new construction and renovation projects.
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Our EUREKA EU35L combines maximum efficiency with modern design. With an output ranging from 6 to 37 kW, it is ideal for commercial buildings.
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The proven LAMBDA user interface offers intuitive operation and flexible adaptation to individual heating needs.
to the controller

Compact hydraulic solution for easy installation of LAMBDA heat pumps
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LAMBDA Principle
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Services
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ECO Hydraulic Solution

Compact hot water and buffer tanks for easy installation

Our proprietary ECO hydraulic solution combines all key components into a single compact unit: a 250-liter hot water tank, a 100-liter buffer tank, a pre-wired hydraulic station, and a convenient mounting option for the control kit, including pre-wired cables.

Suitable for EU10L to EU15L

250-liter enameled hot water tank

100-liter buffer tank for heating

Piped hydraulic station

Convenient mounting option for the control kit

Conduit, insulation, and cable preparation for control kit

Excellent value for money

Less installation effort

Increased operational reliability
_{by reducing wiring and installation errors}

Space-saving

Storage system

ECO Hydraulic Solution

Storage

Net capacity of the drinking water tank

243

l

Net capacity of the buffer tank

109

l

Tilt angle

2099

mm

Weight

95

kg

Diameter including insulation

670

mm

Height including insulation

1990

mm

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Downloads

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Here you will find useful downloadable resources, such as wiring diagrams, user manuals, and data sheets for specific device models. We are also happy to assist you personally if you cannot find the information you need on this page.

LAMBDA
Brochure

Operating and
Installation Instructions

About EUREKA
Installation Instructions

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Installation partners near you

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References

Apartment building in Westendorf, Tyrol

One of the first field test units is located in Westendorf, Tyrol. At this farmhouse, which has a total living area of 450 square meters and five residential units, the oil-fired boiler was replaced with an EU13L air-to-water heat pump.

Customer testimonial: Real numbers, clear results – Two years of operation with the Lambda EU13L

Two years ago, the customer chose the Lambda EU13L to provide his 1964 home with efficient, eco-friendly, and future-proof heating and hot water. This comprehensive review reflects the performance and efficiency of LAMBDA heat pumps.

Efficient heating in a historic home: The LAMBDA heat pump performs flawlessly at 1,500 meters above sea level in the Dolomites

Nestled in the heart of the Dolomites, at an altitude of about 1,500 meters, a LAMBDA heat pump proves that efficient heating is possible even under extreme conditions. Our customer, Sem Valentini, is already entering his fifth heating season—convinced by the technology and the independence it offers him.

Efficient Heating in Older Buildings – LAMBDA Heat Pump in Southern Burgenland

In the Oberwart district of southern Burgenland, the Reiss family decided to switch to a LAMBDA heat pump. Since 2022, their home, built in 1948, has been heated efficiently and environmentally friendly using renewable energy. Despite using traditional radiators as the distribution system, the system impresses with its high efficiency and reliable operation.

Newly built single-family home in Westendorf, Tyrol

This new building, with approximately 250 square meters of living space, is powered by an EU13L system. Hot water is produced hygienically via a fresh water system. Combined with the “PV fence” and an electrical energy storage system, energy costs are reduced to a minimum.

Oil boiler replacement for a single-family home in Westendorf, Tyrol

Instead of the old oil-fired boiler, an EU13L now heats this single-family home in Westendorf, Tyrol.

One unit, three apartments – heating 519 square meters with just one heat pump

In 2023, a modern apartment building with three units and a total living area of 519 m² was built in Heilbronn. For Dipl.-Ing. Johannes Ehnes, one thing was clear from the start: a heat pump would handle all heating and hot water needs—energy-efficient, durable, and future-proof.

Out with the oil boiler, in with the heat pump in a three-unit building in Merano (Italy)

In this multi-unit building, heating and hot water will be provided in the future by an environmentally friendly air-to-water heat pump instead of fossil fuel oil.

Replacement of a (LPG) heating system in an existing building with 3 residential units in Hopfgarten in Tyrol

In this existing building, the propane heating system was removed and replaced with a modern heat pump system.

Replacement of the heating oil system in an existing building with 3 residential units in Mondsee (AT)

"Out with the oil, in with the heat pump" was the motto for this heating system upgrade. With the EU13L, heating costs were reduced by 60%.

Replacement of the oil-fired heating system in a single-family home in Lahnau (Germany)

A successful heating system retrofit. Instead of the old oil-fired boiler, the building is now heated by an EU13L.

Single-family home in Hopfgarten in Tyrol switches from gas to a heat pump

This heat pump replaces an old gas heating system in a single-family home. By intelligently connecting the solar power system to the heat pump, excess electrical power is used to heat the storage tanks and the building.

Single-family home in Thiersee (AT)

Instead of the old oil-fired boiler, this single-family home in Thiersee is now heated by an EU08L. Previously, 1,000 liters of heating oil were used annually for space heating. By connecting it to the photovoltaic system with an energy storage unit, the building can now be heated largely at no cost.