THERMA - Fensterbau Gesellschaft mit beschränkter Haftung primarily manufactures and sells plastic (PVC) windows and plastic (PVC) doors as well as plastic components and additionally supplies glazing, handles, fittings, roller shutters, shading systems and ventilation systems. Founded in 1978 by Georg Spoerl and Lothar Horn, the company has become one of the most successful window manufacturers in the Hochfranken region and operates three plants in Bobengruen (headquarters), Weidenberg and Tanna. The Bobengruen headquarters houses management, administration, sales and IT and employs about 50% of the workforce, while the two production sites in Weidenberg and Tanna each account for roughly 25% of employees. Customers are predominantly regionally located and range from buyers of individual components to clients for cost-effective large series runs of several hundred windows.
Die Herstellung und der Vertrieb von Kunststofffenstern und Kunststofftüren sowie von Bauteilen jeglicher Art aus Kunststoff. Zur Erreichung dieses Zwecks ist die Gesellschaft befugt, gleichartige oder ähnliche Unternehmungen zu errichten, zu erwerben und sich an solchen zu beteiligen und sämtliche Geschäfte zu betreiben, die geeignet sind, die Unternehmungen der Gesellschaft zu fördern.
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Source: German Commercial Register (Handelsregister) Hof Local Court, HRB 623 (as of 5 October 2026)
Source: German Commercial Register (Handelsregister) Hof Local Court, HRB 623 (as of 5 October 2026)
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Source: German Commercial Register (Handelsregister) Hof Local Court, HRB 623 (as of 5 October 2026)
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