WDS 8S — Investment in absolute comfort. This is the most powerful system in our range, designed for building energy-efficient cottages and passive houses (Passivhaus). With 82 mm installation width and 6 chambers, it exceeds the strictest European heat-saving standards.
MD Technology (Triple Seal Systems):
The main distinguishing feature of this system is the third (middle) sealing circuit. It divides the space between frame and sash into two chambers:
By choosing WDS 8S, you get premium German brand characteristics (Veka 82, Salamander bluEvolution) while saving up to 30% of budget.
Technical Specifications
Energy-saving elite. 82 mm profile with third sealing circuit for those who accept no compromises.
System Design Parameters:
Glazing Options:
Certified Characteristics:
Documentation
Energy-saving elite. 82 mm profile with third sealing circuit for those who accept no compromises.
For a standard 2-sash tilt-and-turn window (1200 × 1400 mm) with basic double-glazed unit.
Alternative solutions from other manufacturers
Side by side
How WDS 8S stacks up against the closest matches from other brands.
| Specification | WDS 8SThis profile | Kömmerling 76 MD Zero | Rehau Geneo | Schüco LivIng 82 |
|---|---|---|---|---|
| Brand | WDS | Kömmerling | REHAU | Schüco |
| Material | PVC | PVC | PVC | PVC |
| Profile depth | 82mm | 76 mm | 86mm | 82mm |
| Chambers | 6 chambers | — | 6 chambers | 7 chambers |
| Glass unit, max | 44 mm / 52 mm | up to 50 mm | up to 53mm | up to 52mm |
| Thermal (Uw) | 0.88 | ≤ 0.87 | 0.85 | 0.8 |
| Sound (Rw, dB) | ≈48 Rw(dB) | ≈ 45 Rw(dB) | ≈50 Rw(dB) | ≈47 Rw(dB) |
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FAQs
If you're building your own private home, have panoramic windows, or an apartment with individual heating meter — yes, it's worth it. Savings on electricity bills will pay off the difference in 3-4 years. Plus, the third sealing circuit provides a completely different comfort level (no drafts).
It's a rubber lip in the middle of the frame. Regular windows have two (outside and inside). The third circuit protects metal hardware from water (it doesn't rust) and creates an additional air chamber, improving thermal insulation.
To unlock the 82 mm profile's potential, we recommend installing a double-glazed unit (3 panes) 44 mm thick with low-E coating and argon. Installing a regular "cold" package in such a frame is impractical.
Yes, the WDS 8S system is designed for heavy glass units. Thanks to closed reinforcement and strong profile walls, we manufacture large sashes without sagging risk.
Yes, the hardware groove allows installation of concealed opening sensors (reed switches) for alarms and climate control, preserving window aesthetics.
WDS 8S has similar installation depth (82 mm), 6 chambers, and third sealing circuit — the same technologies as premium German brands. The main difference is price: WDS costs 35-45% less with comparable thermal insulation (Uf ≤ 1.0 W/m²K) and sound insulation (up to 45 dB) characteristics.
