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Slim frames, natural design, and customizable color options for interiors and exteriors – Optiwin’s Lignuma Passive House window system combines durability and low-maintenance with Passive House standards, certified by PHI Darmstadt. This passive-house-certified wood window system merges the best of nature and technology, offering numerous customization options to suit your needs.
Fall Protection
Burglary Protection
Energy Efficiency
Child Safety
Ecology & Sustainability
Soundproofing
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