Thuringian Heat Service

What Thuringian Heat Service does

TWS Thüringer Wärme Service GmbH (Thuringian Heat Service) is a German energy contracting company that plans, finances, builds, operates, and maintains decentralized heat, electricity, and industrial media supply systems for municipalities, housing companies, and industrial enterprises in Thuringia. Formed in October 2018 through the merger of Energie- und Medienversorgung Schwarza GmbH and TWA Wärmeanlagenbau Thüringen GmbH & Co. KG, TWS is a wholly-owned subsidiary of TEAG Thüringer Energie AG, the largest municipal energy company in Thuringia, with headquarters in Rudolstadt and a second operations office in Erfurt.

The company's technology stack spans conventional combined heat and power (the Schwarza CHP plant at ~90% efficiency), micro-CHP units, large-scale heat pumps, power-to-heat boilers, biomass, solar thermal, photovoltaic (in cooperation with TEAG Solar), ORC waste-heat recovery, and adjacent industrial media systems including on-site compressed air, nitrogen (PSA/membrane), and process water generation. Its innovation profile includes the first cold district heating network in Thuringia (Werther, ~70% autarky via geothermal ground collectors), the innovative iKWK coupling system commissioned in Gera-Langenberg in January 2026 serving ~800 apartments, and a planned 100% hydrogen conversion of the Rudolstadt-Schwarza plant through a strategic partnership with Ferngas and Papierfabrik Jass.

TWS monetizes primarily through long-term, contract-based energy contracting — customers receive planning, construction, operation, maintenance, and financing from a single provider without making their own capital investment, paying recurring base and working prices for guaranteed supply. Secondary revenue streams include publicly tariffed electricity products (TWS-Regio, TWS-Lokal tiers) for commercial customers and direct industrial media supply at the Schwarza industrial park. The go-to-market is enterprise field sales targeting B2B and B2G buyers in Thuringia, supported by annual industry events (Thuringian Heat Conference, Open Door Days) and consultative long sales cycles. Certifications (ISO 9001/14001/45001/50001, AGFW-TSM, Top 100 Innovator 2023–2026) underpin credibility in regulated municipal tendering.

Name

Thuringian Heat Service

Legal name

TWS Thüringer Wärme Service GmbH

Website

https://tws-waerme.de

Company type

Private

Founded year

2018

Operating status

Operating

Headcount range

51–100 employees

Short description

TWS Thüringer Wärme Service GmbH is a Thuringia-based energy contracting subsidiary of TEAG that finances, builds, and operates heat, electricity, and industrial media supply systems for municipalities, housing companies, and industrial enterprises across central Germany.

Ownership category

akta.pro rank

Product category

District Heating Services

NAICS

Steam and Air-Conditioning Supply (221330), Electric Power Generation, Transmission and Distribution (2211)

SIC

Cogeneration Services & Small Power Producers (4991), Steam & Air-Conditioning Supply (4961)

akta.pro primary industry

T&D project/program management & owner’s engineering (EPCM/PMC) (EUADAKAF)

akta.pro secondary industry

HVAC & Industrial Ventilation (Chillers, AHUs, Exhaust, Filtration) (EUAEAFAE)

Keywords

• Energy contracting services
• District heating networks
• Combined heat power
• Industrial energy supply
• Heat pump systems

Headquarters

HQ city

Rudolstadt

HQ country

Germany

HQ region

Europe

Offices5 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Infrastructure, Supply Chain, Personnel, Operations, Technology or R&D, Marketing or Sales

Revenue model

1. Energy Contracting Services: Full-service contracting solutions including planning, construction, operation, maintenance, and financing of energy plants. Customers receive guaranteed energy supply without capital investment, paying only base and working prices.
2. Utility Energy Delivery: Supply of heating, electricity, cooling, compressed air, and nitrogen as utility energy to industrial and commercial customers, particularly in the Rudolstadt-Schwarza industrial park.
3. District Heating Networks: Long-term district heating supply contracts with municipalities and housing companies, including infrastructure development and operation.
4. Electricity Products: Direct electricity supply products (TWS-Regio, TWS-Lokal) for commercial customers with annual consumption between 15,000-100,000 kWh, sold at regulated tariffs.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels7 records

Core offering

TWS delivers full-service energy contracting solutions covering consultation, planning, financing, construction, operation and maintenance of energy generation plants, supplying heat, electricity, cooling, compressed air and nitrogen to municipalities, housing companies and industrial enterprises. Customers receive guaranteed energy supply without capital investment, paying base and working prices under long-term contracts, with technologies spanning combined heat and power, large-scale heat pumps, cold district heating networks, biomass, solar thermal and hydrogen-ready infrastructure.

Product overview

Thuringian Heat Service (Thüringer Wärme Service GmbH — TWS) is a 100% subsidiary of TEAG Thüringer Energie AG offering a comprehensive portfolio of energy and media solutions for industry, commerce, municipalities, and housing companies across Thuringia. The core offering centres on energy contracting — a full-service model covering consultation, planning, financing, construction, operation, and maintenance of generation plants — delivering heat, electricity, cold, compressed air, and nitrogen to customers without requiring their own capital investment. The product range spans generation technologies (micro-BHKW, large-scale heat pumps, power-to-heat, solar thermal, biomass, ORC, PV), distribution infrastructure (district heating networks, cold district heating networks), and utility supply (electricity products TWS-Regio and TWS-Lokal for commercial customers). Key flagship projects include the innovative combined heat and power (iKWK) plant in Gera-Langenberg and cold district heating networks in Werther and Triptis.

Differentiator

Problem solved

Functional benefit

Products and services

• Energy Contracting Solutions Full-service contracting covering consultation, planning, financing, construction, operation, maintenance and monitoring of energy generation plants; enables customers in industry, commerce, municipalities and housing to receive energy supply without capital investment.
• District Heating Network Centralised heating distribution infrastructure delivering heat from a central generation plant (iKWK, large heat pumps, gas condensing) to connected residential, commercial and municipal buildings in Thuringia.
• Cold District Heating Network Low-temperature district heating network distributing heat at reduced temperatures via decentralised heat pumps, using geothermal or environmental heat sources; the first such network in Thuringia was implemented in Werther, achieving approximately 70% self-sufficiency.
• Gera-Langenberg iKWK Heating Plant Innovative combined heat and power plant (iKWK) at Gera-Langenberg with BHKW (1.55 MWel, 1.60 MWth), heat pump (1.0 MWth), electric boiler (500 kWth) and 2x gas boilers (2 MWth each), producing 6.5 GWh/a of heat and ~5.6 GWh/a of electricity; serves approximately 800 apartments.
• Triptis District Heating Network New district heating network project serving 14 residential complexes with approximately 800 apartments via a large-scale heat pump powered by regional photovoltaic electricity, reducing ~459 tonnes of CO2 per year; investment over 7 million EUR, planned delivery from 2028.
• Micro-CHP (Micro-BHKW) Micro-scale cogeneration units simultaneously generating electricity and heat from natural gas, LPG or waste heat at high total efficiency for small-scale applications; service and repair managed entirely by TWS.
• Large-Scale Heat Pump Systems Industrial-scale heat pumps using ambient air, geothermal or other renewable sources to generate heating energy at high efficiency, deployed in district heating networks.
• Power-to-Heat (PtH) Installation Electric boiler installation (500 kWth) converting surplus electricity from the public grid into usable district heating, providing grid balancing and renewable integration in the iKWK system.
• Solar Thermal Installations Solar collector systems capturing solar radiation to generate thermal energy stored in solar buffers for later use, reducing heating costs and dependence on fossil fuels.

Quantifiable outcome

• 90% efficiency achieved by combined heat and power plants
• +5 more outcomes

Named customers9 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

Feature5 records

Partnerships

13 partnerships are on record, tiered core and minor.

• Grundstücks- und Wohnungsgesellschaft Pößneck/Triptis GmbHcoreStrategic or Co-development Partner · 21 August 2025District heating network project partnership for 14 residential complexes with 800 apartments. TWS to construct and operate district heating network powered by large heat pump using regional photovoltaic electricity. Investment exceeding 7 million EUR, delivery from 2028.
• Ferngas Netzgesellschaft mbHcoreStrategic or Co-development Partner · 6 November 2023Strategic partnership for hydrogen infrastructure development. Ferngas plans to convert approximately 70km of existing natural gas pipeline from Erfurt area to Unterwellenborn for hydrogen transport. TWS power plant in Rudolstadt-Schwarza to be converted to 100% hydrogen operation, enabling paper factory Jass and other customers to decarbonize operations.
• Papierfabrik Jass (Adolf Jass Schwarza GmbH)coreStrategic or Co-development Partner · 6 November 2023Long-term energy and media supply partnership. TWS supplies process steam, electricity, compressed air, process water, and fire-fighting water to paper production facility. Partnership includes hydrogen conversion cooperation enabling near-total decarbonization of paper manufacturing processes.
• Wohnungsgenossenschaft "Neuer Weg" e.G.coreStrategic or Co-development PartnerPrimary customer for innovative iKWK facility in Gera-Langenberg. Partnership for district heating supply to over 400 apartments in first phase, with expansion to 228 more units by 2030. Collaborative planning from project inception.
• AGFW / Grüne FernwärmeminorStrategic or Co-development PartnerPartnership in national energy efficiency association and Green District Heating platform. As sponsor for Thuringia, supports municipalities in achieving climate protection goals through district heating expansion.
• Tilia GmbHminorImplementation/ SI/ Consulting PartnerConsulting and service company with experience in municipalities, housing industry, and public utilities sectors. Acts as catalyst and coordinator in energy, water, circular economy, and mobility areas.
• TÜV Thüringen e.V.minorImplementation/ SI/ Consulting PartnerQuality assurance and certification partnership. TWS has been member since 2014 with over 300 member companies including research institutions, universities, authorities, and public institutions.
• Förderverein Gebäude- und Energietechnik an der FH Erfurt e.V.minorOthersSupport for practice-oriented education in building and energy technology study program. Two TWS students received awards from this association in 2025.
• Elektro SchwanitzminorChannel Partner/ Reseller/ DistributorLocal electrical services partner for project implementation in the region.
• P|SystemsminorChannel Partner/ Reseller/ DistributorTechnical systems partner for project delivery in the region.
• IBRminorChannel Partner/ Reseller/ DistributorRegional technical services partner for project implementation.
• EFA Chemie GmbHminorChannel Partner/ Reseller/ DistributorRegional chemical services partner.
• geoEnergie KonzeptminorChannel Partner/ Reseller/ DistributorGeothermal energy consulting partner for project development.

Scale indicators9 records

Recent moves8 records

Expansion highlights5 records

Broad incumbents

• E.ON: Large European utility active in municipal heat solutions, heat pumps, and energy services across Germany. Competes with TWS for municipal heat-transition projects as part of a diversified energy portfolio.
• EnBW: Major German integrated utility with municipal heat contracting, district heating networks, and renewable energy solutions. Competes with TWS for municipal heat-transition mandates as part of a wide portfolio spanning generation, grids, and retail.
• ENGIE Deutschland: Large German arm of global energy services group offering district heating, energy contracting, and decarbonization solutions to municipalities and industry. Overlaps with TWS's contracting and heat-transition offerings as part of a much broader portfolio.

Direct peers

• Veolia Energie Deutschland: Operates district heating and cooling networks, cogeneration plants, and energy services for municipalities and industrial customers in Germany. Highly comparable to TWS on heat network operations and CHP/contracting services, with a larger nationwide footprint.
• Dalkia Deutschland: Subsidiary of EDF focused on district heating, cooling networks, and energy services for municipalities and industry in Germany. Closely comparable to TWS in heat network ownership, CHP operations, and municipal contracting model.
• GETEC Group: German energy services specialist offering full-service contracting (planning, financing, construction, operation) for industrial, commercial, and real estate customers. Directly comparable to TWS in business model and end markets across DACH, though with broader geographic reach.

Regional players

• Stadtwerke München (SWM): Munich municipal utility with significant district heating, CHP, and renewable heat infrastructure. Comparable business mix (heat networks, municipal contracting) but serves the Munich metropolitan area rather than Thuringia.
• Stadtwerke Leipzig: Saxony-based municipal utility operating district heating networks, CHP plants, and contracting services. Comparable regional municipal utility profile with similar heat-generation mix and B2G customer base, but serving a different geography.
• Mainova AG: Frankfurt-based municipal utility serving Frankfurt/Rhine-Main with heat, electricity, and gas. Comparable as a regional municipal utility with district heating and contracting capabilities, but operating in a different geography than TWS.

Emerging players

• juwi: German renewable energy project developer focused on wind, solar, and integrated energy solutions for municipalities and industry. Compares to TWS's renewable heat integration (PV via TEAG Solar, biomass, heat pumps) but does not own heat networks.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/36291029

Compliance8 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

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 Thuringian Heat Service