Schüco AWS 75.SI+ (Super Insulation) marks the next step forward in aluminum window technology. The SI+ label signals the presence of dedicated foam inserts within the polyamide thermal bridges, which sharply cut heat loss through the frame.
The system blends the elegance and longevity of aluminum with thermal figures that come close to those of PVC profiles. It's an ideal pick for energy-efficient homes where aesthetics must not be sacrificed.
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
Super-insulating aluminium. A premium 75 mm system whose thermal breaks are foam-filled for top energy performance.
Core system specifications:
Glass and infill choices:
Tested performance values:
Documentation
Super-insulating aluminium. A premium 75 mm system whose thermal breaks are foam-filled for top energy performance.
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 75.SI+ stacks up against the closest matches from other brands.
| Specification | Schüco AWS 75.SI+This profile | Cortizo COR 70 Industrial | Kömmerling Xtrem 76 AD | WDS 76 MD (76 mm) |
|---|---|---|---|---|
| Brand | Schüco | Cortizo | Kömmerling | WDS |
| Material | Aluminium | Aluminium | PVC | PVC |
| Profile depth | 75mm | 70 mm | 76 mm | 76mm |
| Chambers | — | — | — | 6 chambers |
| Glass unit, max | up to 61mm | up to 55 mm | up to 50 mm | up to 48mm |
| Thermal (Uw) | 0.9 | ≤ 1.0 | ≤ 0.9 | 0.92 |
| Sound (Rw, dB) | ≈48 Rw(dB) | ≈ 44 Rw(dB) | ≈ 44 Rw(dB) | ≈45 Rw(dB) |
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FAQs
It is a 75 mm deep aluminium frame (profile height 117 mm) with foam-filled polyamide thermal bridges (SI+ technology) and triple weatherseals using a refined porous-plus-solid central gasket. Frame value reaches Uf from 0.92 W/m²K and the finished window Uw ≤ 0.90 W/(m²·K), rated energy class A++.
The 75 mm build-in depth accepts infills up to 61 mm — enough for heavy triple-glazed, acoustic, or armoured units. A deeper cavity with two warm-edge gaps and low-e coatings is what lets the assembly hit Uw ≤ 0.90 W/(m²·K) and acoustic ratings up to 48 dB (Rw); the frame alone cannot reach those numbers.
For the most demanding passive-house targets the AWS 75.SI+ is bettered by the deeper Schüco AWS 90.SI+, whose 90 mm build, 68 mm glazing and Uw ≤ 0.80 W/(m²·K) reach class A+++ versus this system's A++. The trade-off is depth and price, so choose 90.SI+ only where the colder zone demands it.
The Schüco AWS 65 is a thinner 65 mm thermal-break frame without foam, rated class B at Uw ≤ 1.4 W/(m²·K) and glazing up to 55 mm. The AWS 75.SI+ adds 10 mm of depth, foam-filled bridges and 61 mm glazing to cut that to Uw ≤ 0.90 W/(m²·K) — a full step up in energy class for a higher price.
SI+ fills the polyamide thermal bridges with insulating foam rather than leaving them hollow, and pairs them with the triple-seal central gasket blending porous and solid rubber. Together these push the frame to Uf from 0.92 W/m²K and the energy rating to A++, without changing the 75 mm aluminium geometry.
It runs the concealed Schüco AvanTec SimplySmart fittings rated to 250 kg sash weight, or the mechatronic TipTronic. Tested performance covers:
