Certificate & Specifications

Our Products

Sustainable values, which in addition to technical perfection also include individual and emotional qualities – thus guaranteeing you long-term comfort, security and unbeatable service. OPTIWIN: Quality from Master Craftsmen. >> READ MORE

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Energy-saving door COMFORT

To warm your heart!
The wooden front door OPTIWIN COMFORT ensures a high surface temperature inside and the lowest possible radiation heat loss outside. Even in the entrance area there is no cold air drop so it stays cosy and warm. Choose your own design; we would be happy to advise you.


  • State-of-the-art wooden front door system

  • 2-way and 3-way insulating glazing available

  • Solid door leaf and frame: 68 mm

  • 3D-adjustable door hinges

  • 3-way safety lock

  • Wood types on request

  • As low as UD = 0.90 W/m2K

  • U value approx. 1.3 W/m2K

  • Sound insulation Rw` 32 dB =

  • Sound transmission class 2 DIN 4109

  • Door leaf with climate class test c, d, e according to DIN EN 1121 IFT Rosenheim

  • Resistance class WK I to WK II

  • Painting using ecological water-based paint

  • The core of the door is the door leaf with TARREDO technology



A combination of steel supports to stop distortion and ecological wood composites, free of PU foam plates. 68 mm thick, highly elastic silicone seals, maintenance-free and highly stable halogen-free door components. Use of ecological and sustainable products.