Erdwärme Grünwald

Name

Erdwärme Grünwald

Legal name

Erdwärme Grünwald GmbH

Website

https://erdwaerme-gruenwald.de

Company type

Private

Founded year

2008

Operating status

Operating

Ownership category

akta.pro rank

Product category

Geothermal District Heating

NAICS

Geothermal Electric Power Generation (221116), Steam and Air-Conditioning Supply (22133), Steam and Air-Conditioning Supply (221330)

SIC

Cogeneration Services & Small Power Producers (4991)

akta.pro primary industry

Geothermal Direct Use Heat Projects (District Heating, Greenhouses, Aquaculture, Industrial Heat) (EUAMAEAG)

akta.pro secondary industries

Geothermal Power Plant Development & IPP (Permitting, Financing, Project Development) (EUAMAEAD), Geothermal Equipment & Component Manufacturing (Turbines, Heat Exchangers, Pumps, ORC Units) (EUAMAEAI)

Keywords

• Geothermal district heating
• Renewable heat supply
• Deep geothermal energy
• Municipal energy utility
• Combined heat power

Headquarters

HQ city

Grünwald

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Technology or R&D, Marketing or Sales, Others

Revenue model

1. District heating supply: Recurring revenue from heat supply contracts with residential customers (single-family homes, apartment buildings), commercial businesses, and municipal properties. Revenue comprises three components: (1) capacity/performance price (10% fixed costs, 50% investment costs, 40% labor costs), (2) metering price (50% investment cost, 40% wage cost, 10% fixed cost), and (3) energy/consumption price (35% heat price index, 35% electricity price development, 15% investment cost development, 15% fixed costs). Prices adjusted annually on 1 May.
2. Green electricity feed-in (ORC): EWG operates an ORC power plant generating up to 4.3 MW of green electricity fed into the public grid since December 2014. Revenue from electricity feed-in tariffs.
3. House connection fees: One-time connection fees for district heating hookup, including the house connection itself, building cost contribution (Baukostenzuschuss/BKZ), and pipe laying beyond the 30-meter included limit (214 EUR/m). Lump-sum package for standard connections up to 100 kW: 3,210 EUR gross.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels8 records

Core offering

Erdwärme Grünwald extracts geothermal heat from a 3,755-metre doublet well system at the Laufzorn source (thermal water at 127°C) and distributes it as CO2-neutral district heating to residential, commercial, and municipal properties through an approximately 100+ km underground pipeline network. The company also provides one-time house connection services (Standard House Connection and House Connection Flex) that link customer buildings to the network via company-owned transfer stations, and it generates green electricity through an on-site 4.3 MW ORC power plant for feed-in to the public grid.

Product overview

Erdwaerme Gruenwald is a 100% municipal geothermal energy provider offering a comprehensive district heating ecosystem. The core offering centers on CO2-neutral geothermal heating extracted from thermal water at the Laufzorn doublet well system (production at 3,755m depth, 127°C). This heat is distributed through an approximately 100-110 km district heating network to over 3,700 residential and commercial units. The company operates complementary infrastructure including the Laufzorn Heating Plant (~40 MW thermal output), an ORC Power Plant (4.3 MW electrical, operational since 2014), a Combined Heat and Power Plant (since 2016), and a Power2Heat Plant (since 2017). Customers connect via Standard House Connection or House Connection Flex options, with company-owned transfer stations serving as the interface to building heating systems. The 'String of Pearls' expansion project (including Laufzorn II) aims to create Germany's largest geothermal heating network through cooperation with Stadtwerke Muenchen.

Differentiator

Problem solved

Functional benefit

Products and services

• Geothermal District Heating (Fernwärme) CO2-neutral geothermal heat supplied to residential units (single-family homes, apartment buildings), businesses, and municipal properties through a district heating network. Heat is extracted from thermal water at approximately 3,755 metres depth with a temperature of 127°C. Tariffs comprise capacity, metering, and consumption-based components adjusted annually on 1 May.
• Standard House Connection One-time district heating hook-up package for buildings where the EWG pipe is already installed in the street. Includes 30 metres of house connection pipe from the property boundary to the transfer station and the building cost contribution (BKZ). Lump-sum pricing 3,210.00 EUR gross for connections up to 100 kW; additional pipe billed at 214.00 EUR gross per metre beyond 30 metres; tiered BKZ surcharges above 100 kW.
• House Connection Flex Flexible connection option allowing customers to prepare the building connection now and commission district heating supply at a later date. Includes 30 metres of pipe. Capacity price paid pro-rata: 1/3 in years 1-5, 2/3 in years 6-7, full from year 8-10. Incorporates the 1,000 EUR municipal subsidy and a CO2-savings bonus. Currently unavailable due to federal subsidy conditions.

Quantifiable outcome

• 30,000 tonnes of CO2 saved annually (vs ~20,000 t cited on English site)
• +4 more outcomes

Named customers5 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Ten partnerships are on record, tiered core and minor.

• Stadtwerke München (SWM)coreStrategic or Co-development Partner · 1 January 2025Cooperation between EWG and Stadtwerke München for the 'String of Pearls' (Perlenschnur) project — Germany's largest geothermal heating network. The large heat sink in the Munich district/city enables development and networking of further geothermal energy sources. Both companies are expanding geothermal capacity collaboratively. EWG Managing Director Andreas Lederle and SWM Managing Director Helge-Uve Braun lead the joint initiative.
• Wärmewende durch Geothermie (Initiative)coreGTM or Marketing Partner · 1 January 2020EWG is one of the initiators of the Germany-wide campaign 'Wärmewende durch Geothermie', launched in 2020. The campaign promotes the energy transition through geothermal heating nationwide. EWG serves as a founding promoter of this industry-wide initiative.
• Geothermie Unterhaching GmbH & Co. KG (GUH)coreStrategic or Co-development Partner · 1 January 2013Mutual heat supply and cooperation agreement. Geothermally generated heat from the Laufzorn well has been flowing to Unterhaching since 11 April 2013. The two geothermal drilling sites have been connected by a pipeline since end of 2012. Both companies supply each other with CO2-free heat when needed (e.g., during maintenance). In December 2017, EWG took over ~95% of Geothermie Unterhaching Produktions-GmbH & Co. KG. GUH and EWG operate as a unique inter-municipal joint project.
• Bundesverband GeothermieminorGTM or Marketing PartnerFederal geothermal industry association. Listed as a partner on EWG's website, providing industry information and advocacy for geothermal energy.
• Informationsportal Tiefe GeothermieminorGTM or Marketing PartnerInformation portal for deep geothermal energy. Listed as a partner on EWG's website, providing educational resources for prospective customers.
• Gemeinde Grünwald (Municipality of Grünwald)coreStrategic or Co-development Partner100% municipal owner of Erdwärme Grünwald GmbH. The municipality provides a 1,000 EUR energy efficiency subsidy per geothermal connection, supports via the Environmental Office, and promotes EWG through city channels. EWG's mission is the municipality's energy revolution. The municipality is a key strategic partner for network expansion and customer acquisition.
• Turn- und Sportverein Grünwald e.V. (TSV Grünwald)minorGTM or Marketing PartnerEWG has been the main sponsor of the football department of TSV Grünwald e.V. since 2013 with an annual sponsorship of 20,000 EUR. Supports community engagement and brand visibility.
• Nachbarschaftshilfe Grünwald e.V.minorGTM or Marketing PartnerEWG supports Nachbarschaftshilfe Grünwald e.V. (neighbourhood assistance organization) annually, contributing to community social welfare.
• KlinikClowns Bayern e.V.minorGTM or Marketing PartnerEWG regularly supports the KlinikClowns organization, which brings joy to patients in over 100 Bavarian hospitals and care facilities.
• Pfaffinger UnternehmensgruppeminorImplementation/ SI/ Consulting PartnerConstruction company responsible for building the district heating transport pipeline between Laufzorn and Unterhaching and the north of Grünwald (~4.7 km pipeline). Listed as a contractor on the north connection project.

Scale indicators8 records

Recent moves16 records

Expansion highlights4 records

Direct peers

• Geothermie Unterhaching GmbH & Co. KG: Direct municipal geothermal district heating neighbor in Unterhaching, interconnected with EWG via pipeline since 2013 and ~95% acquired by EWG in 2017. Operates the same South German Molasse Basin resource with similar doublet well technology and ~65 km of pipeline.
• Stadtwerke München (SWM): Partner in the String of Pearls expansion project and operator of its own geothermal facilities (e.g., Freiham, Riem). SWM is the regional incumbent municipal utility developing the Munich geothermal heating network alongside EWG, making it both a co-developer and a strategic comparable.
• Geothermie Holzkirchen: Bavarian municipal deep geothermal district heating operator serving Holzkirchen and surrounding communities from the Molasse Basin. Comparable in technology (hydrothermal doublet), ownership structure (municipal utility), and customer profile (residential + commercial).
• Geothermie Taufkirchen: Adjacent Bavarian municipal geothermal utility serving Taufkirchen with deep geothermal district heating. Direct comparable in scale, technology, and customer mix within the Munich Molasse Basin cluster.
• Geothermie Kirchstockach: Municipal deep geothermal district heating operator in the Munich area, part of the same Bavarian geothermal cluster. Comparable operating model, resource type, and district heating distribution to EWG.
• Stadtwerke München (Geothermie Riem): SWM's Geothermie Riem project is one of Europe's largest geothermal heating plants feeding Munich's district heating network. Comparable in ORC technology, scale, and integrated heat + power output, but operated by a much larger municipal utility.

Regional players

• Enex GeoThermal Engineering GmbH: German geothermal engineering, drilling, and project development firm headquartered in the same Bavarian market. Adjacent comparable — different role in the value chain (services vs. utility) but operating in identical geology and regulatory environment.
• ICELAND GEOTHERMAL ENERGY (ÍSOR) / Orka (HS Orka): Icelandic geothermal utility and consulting ecosystem serving as a global reference for deep geothermal district heating + power. While geographically separate, Iceland's municipal geothermal utilities (e.g., HS Orka, Orkuveita Reykjavíkur) offer comparable integrated heat-and-power business models for benchmarking.

Broad incumbents

• Vattenfall (Geothermie Berlin / distributed district heating): Major European utility with geothermal and large-scale district heating operations in Berlin and elsewhere. Broad incumbent comparable — overlapping in district heating delivery and decarbonization strategy but operating at much larger scale across multiple technologies.
• EnBW (Energie Baden-Württemberg): Large German utility with geothermal exploration projects and extensive district heating networks in southern Germany. Broad incumbent comparable in the German municipal/utility geothermal space, though EnBW operates across many more technologies and geographies.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Erdwärme Grünwald