Ilmenauer Wärmeversorgung GmbH supplies the city of Ilmenau with district heating and operates generation plants including a bio‑natural gas combined heat and power plant as well as a distribution network for heat and cold. It markets the electricity produced in the CHP process under the EEG gross model via direct marketing, generating additional revenues above the EEG base remuneration. The company is a joint venture owned by Iqony Energies GmbH (49%) and the city of Ilmenau (51%) and holds a 49.9% stake in Biomasse‑Heizkraftwerk Ilmenau GmbH, for which it performs operational management under a service agreement. IWV is certified to ISO 9001:2015 and holds a DIN EN ISO 50001:2011 energy management certificate (valid until 22.12.2027); the last ISO audit was on 15.05.2024.
Fernwärmeversorgung in Ilmenau, insbesondere der Bau und Betrieb von Erzeugungsanlagen, auch Kraft-Wärme- Kopplungsanlagen, der Bau und Betrieb von Verteilungsanlagen sowie der Verkauf von Fernwärme und die Vermarktung des im Kraft-Wärme- Kopplungsprozeß erzeugten Stroms.
Converted using the official Destatis and Eurostat correspondence tables; ISIC Rev. 4 is the United Nations' international industry classification.
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Source: German Commercial Register (Handelsregister) Jena Local Court, HRB 301968 (as of 5 November 2026)
| Name | Type | City |
|---|---|---|
| Andreas Böffel | Geschäftsführer(in) | Völklingen |
| Veit Sengeboden | Geschäftsführer(in) | Langewiesen |
Source: German Commercial Register (Handelsregister) Jena Local Court, HRB 301968 (as of 5 November 2026)
| Year | Revenue | Profit | Balance | Employees |
|---|---|---|---|---|
| 2024 | €12,514,919 | €1,309,877 | €26,032,422 | — |
| 2023 | €12,991,430 | €1,938,942 | €23,607,257 | — |
| 2022 | €12,572,016 | €3,211,552 | €21,497,957 | — |
| 2021 | €11,031,605 | €2,526,884 | €18,280,596 | — |
| 2020 | €10,341,194 | €1,834,449 | €17,752,114 | — |
| 2019 | €10,838,919 | €2,037,005 | €14,952,298 | — |
| 2018 | €10,238,720 | €2,046,718 | €13,125,312 | — |
| 2017 | €9,897,375 | €1,276,508 | €12,862,029 | — |
| 2016 | €9,995,369 | €935,448 | €14,075,280 | — |
| 2015 | €10,166,000 | €1,104,000 | €13,858,000 | — |
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Source: German Commercial Register (Handelsregister) Jena Local Court, HRB 301968 (as of 5 November 2026)
Vattenfall Smarter Living GmbH
Berlin · Elektrizitätserzeugung aus erneuerbaren Energieträgern zur Verteilung
EnBW Solar GmbH
Stuttgart · Elektrizitätserzeugung aus erneuerbaren Energieträgern ohne Verteilung
Energieversorgung Burghausen GmbH
Burghausen · Elektrizitätserzeugung aus erneuerbaren Energieträgern ohne Verteilung
| Cost type | Amount | Share |
|---|---|---|
| Personnel Costs | €1,738,319 | 15.4% |
| Material Costs | €8,361,677 | 74.2% |
| Depreciation | €786,659 | 7.0% |
| Interest & Similar | €389,568 | 3.5% |
