WDS 76 MD — Premium-tier technology within everyone's reach. It's our top seller because it brings elite German window features (76 mm depth + central gasket) at mainstream prices.
This system's two key advantages:
If you're deciding between the AD and MD versions, we strongly suggest MD. The cost gap is tiny, yet the comfort and hardware longevity are noticeably greater.
Brand
WDS — modern window systems combining European quality and affordable prices. The manufacturer uses German technology and strict quality control, offering a wide range of profiles: from economical 5S to flagship 8S at Passivhaus level.
More about WDSTechnical Specifications
The top pick for value. 3 sealing contours, 6 chambers and a contemporary design.
Engineering Specifications:
Glass Filling Choices:
Largest Build Sizes:
Tested Performance:
Documentation
The top pick for value. 3 sealing contours, 6 chambers and a contemporary design.
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 76 MD (76 mm) stacks up against the closest matches from other brands.
| Specification | WDS 76 MD (76 mm)This profile | Kömmerling Xtrem 76 AD | Rehau Synego | Veka Softline 82 |
|---|---|---|---|---|
| Brand | WDS | Kömmerling | REHAU | VEKA |
| Material | PVC | PVC | PVC | PVC |
| Profile depth | 76mm | 76 mm | 80mm | 82mm |
| Chambers | 6 chambers | — | 7 chambers | 7 chambers |
| Glass unit, max | up to 48mm | up to 50 mm | up to 51mm | up to 52mm |
| Thermal (Uw) | 0.92 | ≤ 0.9 | 0.94 | 1.0 |
| Sound (Rw, dB) | ≈45 Rw(dB) | ≈ 44 Rw(dB) | ≈46 Rw(dB) | ≈47 Rw(dB) |
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FAQs
It is a 76 mm, 6-chamber PVC profile carrying an A++ energy rating. The profile itself reaches a frame value of Uf ~1.1 W/m²K, while a complete window hits Uw ≤ 0.92 W/(m²·K). With the right glass unit the assembly achieves a heat-resistance value of Ro up to 1.02 m²°C/W.
MD stands for the third, middle gasket contour added between the outer and inner seals. It does two jobs:
The 76 mm depth accepts glazing up to 48 mm thick, room enough for extra-wide double-chamber units with 16-18 mm spacers. Wider gaps between panes trap more insulating gas, which is what holds whole-window heat loss down to Uw ≤ 0.92 and keeps the inner frame surface warm enough to resist condensation.
A single sash can reach up to 1100 mm wide and up to 2400 mm tall. That envelope relies on the rigidity of the 76 mm profile, its Class A outer wall gauge and 1.5-2.0 mm steel reinforcement. Larger openings than this fall outside the system's tested limits and need a different solution.
Both share the 76 mm depth and 48 mm glazing limit, but the MD adds the middle seal and a sixth chamber.
If budget is tight, the WDS 7S (70 mm, Uw ≤ 1.2) starts at €400 against the MD's €520. If you need the absolute best, the WDS 8S goes deeper at 82 mm with Uw ≤ 0.88 and ~48 dB. The MD also tops out at a 1100 × 2400 mm sash, so very large openings need another system.
