Schüco AWS 90.SI+ is a feat of engineering that unites two seemingly opposite qualities: cold metal and insulation rivaling that of wood or premium PVC. The Passive House Institute (PHI Darmstadt) has officially certified this system as a component for energy-efficient construction.
It is the ideal choice for anyone building a future-proof, zero-energy home who refuses to give up the elegance of aluminum, slim frames, and panoramic formats.
Brand
Schüco is the choice of architects who don't compromise. The German corporation is famous for aluminum facade systems that adorn skyscrapers worldwide. For private clients, Schüco offers the same technologies in premium window and sliding system formats.
More about SchücoTechnical Specifications
The ultimate ceiling. A Passive House-certified aluminium system built to a 90 mm depth.
Core system specifications:
Glass and infill choices:
Tested performance values:
The ultimate ceiling. A Passive House-certified aluminium system built to a 90 mm depth.
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 Schüco AWS 90.SI+ stacks up against the closest matches from other brands.
| Specification | Schüco AWS 90.SI+This profile | Cortizo COR 80 Industrial | Rehau Geneo | Kömmerling AluNext MD |
|---|---|---|---|---|
| Brand | Schüco | Cortizo | REHAU | Kömmerling |
| Material | Aluminium | Aluminium | PVC | PVC |
| Profile depth | 90mm | 80 mm | 86mm | 80 mm |
| Chambers | — | — | 6 chambers | — |
| Glass unit, max | up to 68mm | up to 65 mm | up to 53mm | up to 56 mm |
| Thermal (Uw) | 0.8 | ≤ 0.8 | 0.85 | ≤ 0.8 |
| Sound (Rw, dB) | ≈47 Rw(dB) | ≈ 46 Rw(dB) | ≈50 Rw(dB) | ≈ 45 Rw(dB) |
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FAQs
The full 90 mm build-in depth houses a refined thermal-break zone with long polyamide bridges and foam inserts. It delivers a frame value Uf from 0.71 W/m²K and a whole-window Uw ≤ 0.80 W/(m²·K) with the right glass unit, earning an A+++ energy rating. Air infiltration is Class 4 and watertightness reaches Class 9A.
The frame accepts an infill depth of up to 68 mm — enough for heavy triple-chamber units (4 panes) or double-chamber builds with thick laminated glass. This extra capacity is the physical reason the system can pair top insulation with high mass, pushing acoustic ratings to up to 47 dB Rw for calm even near an airport.
It is the flagship system, priced from €1,400–1,900 — well above siblings like the AWS 75.SI+. In a mild climate the 90 mm thermal-break zone is engineering you will not feel the benefit of, so a shallower system can match comfort for less. Choose it for Passive House targets or extreme cold, not as a default.
All three are aluminium thermal-break windows, but the gap is real. The AWS 90.SI+ reaches Uw ≤ 0.80 (A+++) and takes glass up to 68 mm. The AWS 75.SI+ sits at Uw ≤ 0.90 (A++, glass to 61 mm), and the AWS 65 at Uw ≤ 1.40 (B, glass to 55 mm). Deeper profile, thicker glass, better insulation as you move up.
Yes — it is a Passive House-certified aluminium system built to a 90 mm depth, described as "the ultimate ceiling" for performance. Its foam thermal-break technology was created for extreme conditions and keeps the inner profile surface above the dew point, ruling out freezing even in bitter frost.
The system holds Cradle to Cradle certification (silver level), attesting to material safety and complete recyclability. Weatherproofing comes from triple sealing with a bulky central gasket that stays airtight in hurricane-strength winds, and intrusion resistance reaches RC3 class (formerly WK3). The visible frame face is held to 117 mm.
