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Applications
Heat pump
excellence
Indoor units
Outdoor units
Market environment
Building
Requirement
Subsidy

Application: Market environment.

The construction sector in transition.

  • the demand for heat pump systems is increasing – particularly in the housing stock
  • building structures with old heating systems require flexible and future-proof modernisation options, while particularly space-saving solutions are needed in new-builds
  • desire for a higher share of renewable energies

Application: Building.

The versatile system for heat pumps in new and existing buildings.

In light of legal frameworks, such as the Building Modernisation Act (GModG) and attractive state subsidy options, heat pumps play a vital role when it comes to selecting a heating system, both in new-builds and existing buildings. Depending on the application and building, different aspects must be considered when choosing a suitable heat pump system. A flexible choice of heat pump indoor unit allows you to optimally address different requirements and needs.

Application: Requirement.

Ideal conditions for seamless system optimisation.

  • energy efficiency and operating cost optimisation
  • comfort and convenience
  • flexible, quick and simple planning and installation
  • optimised space requirements and an attractive design

Application: Subsidy.

Modernising pays off.

As part of the climate package, renewable heating systems can receive state subsidies. Buderus will inform, advise and support you in this process.

Our free advice hotline:

0800 0 2030 00

Monday–Friday, 7 a.m. to 7 p.m.
www.buderus.de/beg

Application: Subsidy.

The BEG subsidy programme.

The BEG (German federal government subsidies for efficient buildings) is replacing the existing programmes from the Credit Institute for Reconstruction (KfW) and the Federal Office of Economics and Export Control (BAFA). Proven elements have been developed further and bundled into three sub-programmes, which is intended to make the subsidy programme easier to understand for citizens, companies and municipalities.

Application: Subsidy.

With febis for optimum funding for modernisation.

  • customers interested in modernisation of an individual measure with a renewable heating system receive straightforward advice from the subsidy professionals at febis
  • online service based on checklist and heating system quote
  • dedicated information page at www.buderus.de/foerderservice-ek and funding hotline on +49 (0) 6190 9263 492*
* The funding hotline employees are available to you Monday to Friday between 9 a.m. and 5 p.m.

The febis funding service for trade customers.

  • web-based funding service application especially for contractors
  • reduced work and research effort
  • customer acquisition and retention through a range of services in a multi-stage process
  • information service:
    www.fachkunden.buderus.de/fachkunden-foerderservice and funding hotline
    on +49 (0) 6190 9263 431
Unrenovated
Partially renovated​
Renovated
New build

Heat pump excellence: Heat pumps in unrenovated existing buildings.

Modernising heating systems.

The existing heat distribution and heat transfer system is to be retained and operated with a heat pump that is optimised for replacing existing oil or gas boilers. In addition, it should be possible to install a photovoltaic system with an energy management system or a stove. In addition, if you consider replacing the radiators, the heat pump can be operated at lower flow temperatures.

Heat pump excellence: Heat pumps in unrenovated existing buildings.

Modernising with costs in mind.

Our house was built in 1960 and has only had some minor renovation work in the meantime. The distribution systems consists solely of radiators and we'd like to directly replace the outdated oil heating system with a heat pump. Our areas of focus are investment and running costs, as well as convenience. We'd also like to incorporate a stove into the new heating system.

Heat pump excellence: Heat pumps in unrenovated existing buildings.

Encouraging convenience. Fostering modernisations.

The selected heat pump system consists of the WLW MBE+ AR outdoor unit and the Logatherm WLW186i AR E indoor unit. The heat pump can be installed directly and operated efficiently because it is optimised for use in existing buildings with higher design temperatures. It is straightforward to integrate a stove into the heating system thanks to the versatile Logatherm WLW186i AR E indoor unit. Replacing the existing oil heating system allows you to benefit from the maximum level of subsidy.

Outdoor unit WLW MBE+ AR awarded for its clear and high-quality design language in the discipline: Product Design / Category: Home Technology​

​ .    

* The rating shows the energy efficiency of the system with the Logatherm WLW186i-13 MBE+ AR E and the Logamatic BC400 system control unit. The rating may vary according to the components or output.​

Heat pump excellence: Heat pumps in partially renovated existing buildings.​

Using existing components. Adding a heat pump.

The existing heat distribution and heat transfer system is to continue to be used and operated with a heat pump in the future. Apart from replacing a window, no renovation work is planned. The focus is on operating the heat pump with the existing radiators – without any modifications to the heat distribution system and with a heating system that can be expanded with additional components at a later stage.

Heat pump excellence: Heat pumps in partially renovated existing buildings.​

Built in 1960. Renovated to be future-proof in 2023.​

Our house was built in 1970 and is largely in its original condition. We would like to tackle the renovation in manageable steps. First, we’ll replace the windows to improve the home's appearance. After that, we'd like to switch to a heat pump system that allows us to continue using the existing heating elements. So we're looking for a solution that works efficiently with our existing heating elements and does not require major renovation work.

Heat pump excellence: Heat pumps in partially renovated existing buildings.​

Space-saving. Fit for existing buildings. Low-noise.

​The right solution is the Logatherm heat pump system WLW186i MBE+ AR, which consists of the outdoor unit WLW MBE+ AR and indoor unit Logatherm WLW186i AR TP70. The system was specifically designed for existing buildings that require higher flow temperatures and operates very reliably even with existing heating elements. The indoor unit already includes heating system components and a buffer tank – this also saves space and makes installation simpler. ​

Heat pump excellence: Heat pumps in renovated existing buildings.

From gas boiler to heat pump system.

The existing heat transfer system should be partially retained and partially replaced with an underfloor heating system. The outdated gas boiler is replaced with a heat pump system. From the customer's perspective, independence from fossil energy sources is a key priority, alongside the quiet operation of the heat pump.

Heat pump excellence: Heat pumps in renovated existing buildings.

Built in 1960. Renovated to be future-proof in 2023.

Our house was built in 1960 and we had it extensively renovated in 2023. We achieve high power coverage by reducing energy consumption in a targeted manner and adding a photovoltaic system. Our focus is on future-proofing by no longer using fossil energy sources.

Heat pump excellence: Heat pumps in renovated existing buildings.

Space-saving. Fit for existing buildings. Low-noise.

The selected heat pump system consists of the WLW MB AR outdoor unit and the Logatherm WLW186i AR TP70 indoor unit. The outdoor unit is remarkably quiet and fits well in the area in front of the house. The indoor unit with an integrated buffer cylinder requires little space in a cellar and can also be used in areas with a low ceiling height. The system is monitored and controlled, and the amount of self-generated electricity used is optimised, using the MyEnergy Master app.

Heat pump excellence: Heat pumps in new buildings.

Increasing demands with the house efficiency standards.

In light of legal frameworks, such as the Building Modernisation Act (GModG) and the defined house efficiency standards, heating and ventilation systems play a vital role in new-builds. Alongside a comfortable indoor climate, demand for self-generated electricity and systems without fossil fuels is growing.

Note: Above you can see the "Barefoot Home" by SchwörerHaus (Show Home Centre 72531 Hohenstein-Oberstetten, Germany) – equipped with a Buderus heat pump system. Photo: SchwörerHaus/J. Lippert

Heat pump excellence: Heat pumps in new buildings.

Compact system solution for domestic homes made from a timber construction.

We're looking for an efficient heat pump system solution for our new home. The heating system should take up as little space as possible both internally and externally and fit in well in the surrounding area. Our areas of focus are the price-performance ratio and simple installation.

Note: Above you can see the "Barefoot Home" by SchwörerHaus (Show Home Centre 72531 Hohenstein-Oberstetten, Germany) – equipped with a Buderus heat pump system. Photo: SchwörerHaus/J. Lippert

Heat pump excellence: Heat pumps in new buildings.

Minimal space requirement. Full system performance.

The selected heat pump system consists of the WLW MB AR outdoor unit and the Logatherm WLW176 AR T180 indoor unit. The remarkably quiet outdoor unit fits into a variety of environments thanks to its compact, modern design and can be installed even on the smallest of plots. To minimise the amount of space needed inside buildings as well, all of the heating system components are integrated on just 0.4 m².

Indoor units
Logatherm
WLW186i TP70
Logatherm
WLW186i T180
Logatherm
WLW186i E
Logatherm
WLW176i T180

Indoor units: Convenient solution for existing buildings.

Air to water heat pump Logatherm WLW186i AR TP70

  • output sizes: 4 kW, 5 kW, 7 kW, 10 kW and 12 kW
  • quiet operation and high-quality titanium design
  • natural refrigerant R290 (propane) with a global warming potential (GWP) of 0.02*
  • low installation height of the indoor unit of 1.2 m enables installation in basements with low ceiling heights
* Global Warming Potential, based on IPCC AR6.

Indoor units: Convenient solution for existing buildings.

Air to water heat pump Logatherm WLW186i AR TP70

Top-spec equipment included as standard:

  1. 70 l buffer cylinder
  2. primary circuit and heating circuit pump built in
  3. integrated heating/domestic hot water diverter valve
  4. integrated MX400 LAN and wireless module
  5. Logamatic BC400 system control unit
  6. accessories: Extension kit for 2nd internal heating circuit

Indoor units: Convenient solution for existing buildings.

Air to water heat pump Logatherm WLW186i AR T180

  • output sizes: 4 kW, 5 kW, 7 kW, 10 kW and 12 kW
  • quiet operation and high-quality titanium design
  • natural refrigerant R290 (propane) with a global warming potential (GWP) of 0.02*
  • space-saving design thanks to integration of all system components in the indoor unit
* Global Warming Potential, based on IPCC AR6.

Indoor units: Convenient solution for existing buildings.

Air to water heat pump Logatherm WLW186i AR T180

Equipped as standard with:

  1. 180 l DHW cylinder
  2. 16 l buffer cylinder
  3. heating/domestic hot water diverter valve
  4. primary circuit and heating circuit pump
  5. Logamatic BC400 system control unit
  6. internet-ready thanks to the MX400 LAN and wireless module

Indoor units: Convenient solution for existing buildings.

Air to water heat pump Logatherm WLW186i AR E

  • available in output sizes of 4 kW, 5 kW, 7 kW, 10 kW and 12 kW
  • quiet operation and high-quality titanium design
  • natural refrigerant R290 (propane) with a global warming potential (GWP) of 0.02*
  • can be flexibly combined with a stove or solar thermal system, hygienic domestic hot water generation via fresh water station
* Global Warming Potential, based on IPCC AR6.

Indoor units: Convenient solution for existing buildings.

Air to water heat pump Logatherm WLW186i AR E

Extensive top-spec equipment included as standard:

  1. electric booster heater with 9 kW
  2. heating/domestic hot water diverter valve
  3. Logamatic BC400 system control unit
  4. high-efficiency pump for primary circuit
  5. MX400 LAN and wireless module included in the scope of delivery

Indoor units: Convenient solution for new buildings.

Air to water heat pump Logatherm WLW176i AR T180

  • available in output sizes of 4 kW, 5 kW, 7 kW, 10 kW and 12 kW
  • a new dimension: Quiet operation of the compact outdoor unit thanks to SILENT plus technology
  • space-saving design thanks to integration of all system components in the indoor unit
  • natural refrigerant R290 (propane) with a global warming potential (GWP) of 0.02*
* Global Warming Potential, based on IPCC AR6.

Indoor units: Compact solution for new buildings.

Air to water heat pump Logatherm WLW176i AR T180

Equipped as standard with:

  1. 180 l DHW cylinder
  2. 16 l buffer cylinder
  3. built-in expansion vessel
  4. heating/domestic hot water diverter valve
  5. primary circuit and heating circuit pump
  6. internet-ready thanks to the MX400 LAN and wireless module
  7. Logamatic BC400 system control unit
Outdoor units​
WLW MB AR
4 to 7 kW
WLW MB AR 10 to 12 kW
WLW MBE+ AR
11 to 15 kW

Outdoor units: WLW MB AR (4 to 7 kW)

The new dimension: SILENT plus technology

  • simulation-based and fine-tuned design
  • integrated sound diffuser and avoidance of optical sound by means of a covered fan
  • double vibration-separated refrigerant circuit in sound-insulated refrigerant circuit box
  • intelligent control in the optimal frequency range

Outdoor units: WLW MB AR (10 to 12 kW)

High performance, compact size

  • compact design
  • highly versatile thanks to the large modulation range
  • enhanced SILENT plus technology
  • Titanium Design

Outdoor units: WLW MBE+ AR​

Systematically optimised for replacing boilers.​

  • available in three power ratings up to 15 kW (A-7/W55)​
  • developed for existing buildings: flow temperature up to 75 °C, SCOP up to 5.4 at 35 °C
  • ideal for the quick, straightforward replacement of older fossil-fuel boilers
  • software update with the ProWork app can be carried out directly by a heating specialis
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Legal information

© Bosch Thermotechnik GmbH 2026, all rights reserved.

Corporate information

Responsible for the internet pages of Bosch Thermotechnik GmbH

Name and address

Bosch Thermotechnik GmbH
Sophienstrasse 30-32
35576 Wetzlar
GERMANY

Board of management

Jan Brockmann (Chairman),
Nora Klug,
Oliver Koukal,
Stephan Lampel,
Birte Lübbert,
Stefan Thiel,
Maria Zesch

Telephone number

+49 6441 418-0

E-Mail-Address

info.thermotechnik@de.bosch.com

Place of business

Wetzlar

Registrations

Court of Record: Wetzlar
HRB HR B 13

VAT ID No

DE 811164527

Dispute resolution

Bosch Thermotechnik GmbH: We do not engage in out-of-court settlements before consumer arbitration bodies.

Data Protection Notice

We welcome you to our online offer and thank you for your interest in our company and our products.

The protection of your privacy when processing personal data as well as the security of all business data are important issues to us, which we consider in our business processes.

General Information

Controller

We, Bosch Thermotechnik GmbH, are responsible for processing your personal data on this online offer.

Our contact details are as follows:

Bosch Thermotechnik GmbH, Sophienstraße 30-32, 35576 Wetzlar, Germany; Tel.: +49 6441 418-0

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We may process your personal data to protect and defend our rights. This purpose also constitutes our legitimate interest.

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Log files are stored by us for the purpose of investigating service disruptions and for security reasons (e.g. to clarify attempted attacks) for a period of 30 days. Log files whose further storage is necessary for the purpose of evidence are exempt from deletion until the final clarification of the respective incident and may be passed on to investigative authorities in individual cases.

The following information is stored in the log files:

  • IP address (internet protocol address) of the accessing device;

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You have the right to request access to the personal data concerning you, as well as the right to rectification, the right to erasure, the right to restriction of processing and the right to data portability. Insofar as you have given us consent to process your personal data, you may revoke this consent at any time with future effect.

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You have the right to lodge a complaint with a supervisory authority. You can appeal to the supervisory authority which is responsible for your place of residence or your state of residency or to the supervisory authority responsible for us. This is:

The Information Commissioner’s Office
Water Lane, Wycliffe House
Wilmslow – Cheshire SK9 5AF
Tel. +44 1625 545 700
email: casework@ico.org.uk
Website: https://ico.org.uk

or

The Data Protection Commission
21 Fitzwilliam, Square South
Dublin – Ireland D02 RD28
Tel. +353(01) 7650100 / 1800437 737
email: dpo@dataprotection.ie
Website: dataprotection.ie

Contact

If you wish to contact us, please find us at the address stated in the Controller section.

To assert your rights and to notify data protection incidents please use the following link: https://request.privacy-bosch.com/entity/TTDE/lang/en-GB/?app=https://rb-wam.bosch.com/gdpr/de/it_landscape/applicationsimpleproxy/2639/change/

You can contact us as well under: privacy.ttde@bosch.com

For suggestions and complaints regarding the processing of your personal data we recommend that you contact our data protection officer:

Data Protection Officer
Information Security and Privacy (C/ISP)
Robert Bosch GmbH
P.O. Box 30 02 20
70442 Stuttgart, GERMANY

or

mailto: DPO@bosch.com

Changes to the Data Protection Notice

We reserve the right to change our security and data protection measures. In such cases, we will amend our Data Protection Notice accordingly. Therefore, please note the current version of our Data Protection Notice, as it is subject to change.