What is Schüco AWS 90.SI+?

Schüco AWS 90.SI+ (Aluminium Window System, Super Insulation) is a window system from the German manufacturer Schüco International KG with an installation depth of 90 mm and a Uf coefficient from 0.71 to 1.0 W/m²K. The system is certified by the Passive House Institute in Darmstadt and is the flagship thermal insulation series in the Schüco AWS range.

What is the thermal insulation coefficient of Schüco AWS 90.SI+?

The frame thermal transmittance Uf ranges from 0.71 to 1.0 W/m²K depending on the insulating insert configuration and profile sightline width. In the passive house-certified version with a 117 mm sightline width, Uf reaches 1.0 W/m²K. With triple glazing (Ug 0.6 W/m²K), the overall window coefficient Uw is 0.8 W/m²K.

Is Schüco AWS 90.SI+ certified for passive houses?

Yes. The system is certified by the independent Passive House Institute (PHI) in Darmstadt, starting from a profile sightline width of 117 mm. This is one of the few aluminium window systems on the market with official passive house certification.

What is the installation depth of Schüco AWS 90.SI+?

The system's installation (base) depth is 90 mm — 15 mm more than AWS 75.SI+. The increased depth allows for a wider insulation zone and even lower Uf values.

What sound insulation does Schüco AWS 90.SI+ provide?

The maximum sound insulation coefficient Rw is up to 47 dB, providing high acoustic comfort near busy roads. The special AWS 90 AC.SI version (acoustic window) allows ventilation without letting in street noise.

What variants are available for AWS 90.SI+?

Several variants are available: AWS 90 BS.SI+ (Block System) — a block system with a concealed sash for maximum transparency; AWS 90 AC.SI — an acoustic window with ventilation without street noise; WoodDesign — a wood-clad sash finish; Level Threshold — a version with a flush, barrier-free threshold.

What glazing thickness does Schüco AWS 90.SI+ support?

The system supports glazing units and panels up to 68 mm thick, including triple energy-saving units with a warm-edge spacer and a Ug coefficient of up to 0.5–0.6 W/m²K.

What is the difference between Schüco AWS 90.SI+ and AWS 75.SI+?

AWS 90.SI+ has a greater installation depth (90 mm versus 75 mm), a lower Uf coefficient (from 0.71 versus from 0.9 W/m²K), and official Passive House Institute certification. The system is aimed at projects requiring the maximum possible thermal insulation from an aluminium window, including passive house construction.

What is the maximum sash weight and size of Schüco AWS 90.SI+?

The maximum sash weight is up to 250 kg, maximum width is 1700 mm, and maximum height is 2500 mm. The concealed AvanTec SimplySmart hardware and mechatronic TipTronic (for sashes up to 160 kg) are designed for heavy, large-format constructions.

What buildings is Schüco AWS 90.SI+ suitable for?

The system is suitable for private houses and cottages built to the passive house standard, energy-efficient multi-family residential buildings, office and administrative buildings, and properties where energy efficiency is a project priority. Compatible with the Schüco ADS 90.SI door system for a unified architectural solution.

What colours are available for Schüco AWS 90.SI+?

Any colour from the RAL scale is available, along with anodising, matte and textured finishes, two-tone execution (different colours outside and inside), and custom decorative finishes on request.

AWS 90.SI+ Schüco

Name: Schüco AWS 90.SI+
Brand: Schüco
Availability: InStock

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0.71

Uf W/m²K
frame coef.

47 dB

Rw max.
sound insulation

RC3

burglar
resistance

90 mm

installation
depth

250 kg

max. sash
weight

About the Schüco AWS 90.SI+ system

🏅 AWS — Aluminium Window System · SI+ — Super Insulation · Passive House Institute (Darmstadt) certification · Germany

Schüco AWS 90.SI+ (Aluminium Window System, Super Insulation) is the flagship thermal insulation window system from the German manufacturer Schüco International KG. An installation depth increased to 90 mm and an extended insulation zone with foam-composite insulating bars achieve a frame coefficient Uf from 0.71 W/m²K — one of the best figures among serial aluminium window systems on the market.

The system is certified by the independent Passive House Institute in Darmstadt starting from a profile sightline width of 117 mm, making it one of the few aluminium solutions with official approval for passive house construction. A co-extruded centre gasket with additional fins and optimised glazing rebate insulation ensure consistently high thermal performance in any configuration.

Concealed Schüco AvanTec SimplySmart stainless steel hardware is designed for sashes weighing up to 250 kg and provides burglar resistance up to class RC3 (WK3). A wide model range — the standard AWS 90.SI+ version, the AWS 90 BS.SI+ block system with a concealed sash, the AWS 90 AC.SI acoustic window, and the WoodDesign version with a natural wood finish — opens up maximum architectural design freedom.

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Schüco AWS 90.SI+ — corner section of the 90 mm frame and sash

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Technical specifications — Schüco AWS 90.SI+

Thermal insulation and comfort

Uf coefficient (frame)	0.71–1.0 W/m²K
Uw coefficient (triple glazing, Ug 0.6)	0.80 W/m²K
Passive house certification	PHI Darmstadt (from 117 mm)
Water tightness	Class 9A
Sound insulation Rw max.	up to 47 dB
Burglar resistance (DIN EN 1627)	up to RC3 (WK3)

Profile geometry

Installation (base) depth	90 mm
Sightline width (standard)	117 mm
Sightline width (optimized version)	from 122 mm
Minimum sightline width (Block System)	from 99 mm

Dimensions and glazing

Sash height	540–2500 mm
Sash width	470–1700 mm
Max. sash weight	up to 250 kg
Glazing unit / panel thickness	up to 68 mm
Standard glazing	double Ug 1.1 / triple Ug 0.6 W/m²K

General information

Manufacturer	Schüco International KG
Country of manufacture	Germany
Standard	AWS — Aluminium Window System
Application	Windows, balcony doors, passive house facade elements
Hardware	AvanTec SimplySmart / TipTronic SimplySmart
Compatibility	Schüco ADS 90.SI door system

* Uw 0.80 W/m²K is achieved with triple glazing of Ug 0.6 W/m²K and a plastic spacer on a reference sample of 1.23×1.48 m. The Uf value depends on the type of insulating inserts and the selected profile sightline width.

AWS 90.SI+ design variants

The AWS 90.SI+ system offers several specialised variants — each addressing a distinct architectural or functional requirement on a single thermal-performance base.

BS.SI+

Block System

A block system with a concealed sash and a sightline width from 99 mm — maximum transparency and clean architectural lines with no visible sash contours.

AC.SI

Acoustic Window

An acoustic window with ventilation through convection cassettes at the top of the frame — fresh air without street noise penetration up to 47 dB.

WoodDesign

Wood-Aluminium

The sash is clad with a natural wood finish — the warmth of wood in the interior while retaining the slim aluminium profile and SI+ thermal performance.

Advantages of Schüco AWS 90.SI+

Passive house-level thermal insulation

Uf from 0.71 W/m²K — one of the best figures among aluminium window systems. With triple glazing, Uw reaches 0.80 W/m²K.

Passive House Institute certification

Official PHI Darmstadt certification confirms the system meets the strict criteria of passive house construction.

Burglar resistance up to RC3

The highest class under DIN EN 1627 (WK3). AvanTec SimplySmart Open Secure hardware maintains RC2 protection even in the tilted position.

Sound insulation up to 47 dB

Effective protection against traffic noise in urban buildings; the AC.SI version allows ventilation without losing acoustic comfort.

Extended insulation zone

A 90 mm installation depth and foam-composite insulating bars with a co-extruded centre gasket ensure stable thermal performance.

Concealed AvanTec hardware

Fully concealed inside the construction — clean profile lines outside and inside with no visible hinges, designed for sashes up to 250 kg.

Schüco TipTronic

Mechatronic hardware for sashes up to 160 kg — automated opening/closing and integration into smart home systems.

Large-format constructions

Sash width up to 1700 mm, height up to 2500 mm at a weight of up to 250 kg — bright panoramic openings with no loss of thermal insulation.

Model range flexibility

Standard version, block system with a concealed sash, acoustic window, and a wood-clad version within a single platform.

Where Schüco AWS 90.SI+ is used

Schüco AWS 90.SI+ is the system of choice for projects where the thermal insulation of an aluminium window is of primary importance: private houses and cottages built to the passive house standard, energy-efficient multi-family residential buildings, and office and administrative properties certified to sustainable construction standards. The AC.SI version is in demand for properties near busy roads, airports and railways, where natural ventilation without noise penetration is required — schools, hospitals, hotels and residential complexes. The BS.SI+ block system is used where the architectural design calls for maximum visual lightness of the facade with no visible sash contours. Compatibility with the Schüco ADS 90.SI door system ensures a unified technological and visual solution for the entire building.

Opening types

Fixed windows
Side-hung windows
Tilt-and-turn windows
Outward opening
Balcony and terrace doors
Level threshold version
Ribbon glazing
Facade infill elements

Colour options

RAL painting (any colour)
Anodising
Matte finishes
Textured finishes
Two-tone (interior / exterior)
Custom decorative finishes on request

Supply, installation and warranty

Logi24 offers professional consultation, supply and installation of Schüco AWS 90.SI+ aluminium windows across Europe. We will help you select the optimal variant, profile colour, glazing configuration, hardware type and additional options — whether for a private house built to the passive house standard, a multi-family residential building, or a large energy-efficient commercial property. A warranty is provided on products and installation work. For detailed information and a cost estimate, please contact our specialists.

Frequently asked questions

What is Schüco AWS 90.SI+?+

Schüco AWS 90.SI+ (Aluminium Window System, Super Insulation) is a window system from the German manufacturer Schüco International KG with an installation depth of 90 mm and a Uf coefficient from 0.71 to 1.0 W/m²K. The system is certified by the Passive House Institute in Darmstadt and is the flagship thermal insulation series in the Schüco AWS range.
What is the thermal insulation coefficient of Schüco AWS 90.SI+?+

The frame thermal transmittance Uf ranges from 0.71 to 1.0 W/m²K depending on the insulating insert configuration and profile sightline width. In the passive house-certified version with a 117 mm sightline width, Uf reaches 1.0 W/m²K. With triple glazing of Ug 0.6 W/m²K, the overall window coefficient Uw is 0.80 W/m²K.
Is the system certified for passive houses?+

Yes. The system is certified by the independent Passive House Institute (PHI) in Darmstadt, starting from a profile sightline width of 117 mm — one of the few aluminium window systems on the market with official passive house certification.
What is the installation depth of the system?+

The installation (base) depth is 90 mm — 15 mm more than AWS 75.SI+. The increased depth allows for a wider insulation zone and even lower Uf values.
What sound insulation does Schüco AWS 90.SI+ provide?+

The maximum sound insulation coefficient Rw is up to 47 dB. This provides high acoustic comfort near busy roads. The special AWS 90 AC.SI version (acoustic window) allows ventilation without letting in street noise, through convection cassettes at the top of the frame.
What burglar resistance class does Schüco AWS 90.SI+ have?+

The system is tested for burglar resistance up to RC3 (WK3) under DIN EN 1627, thanks to the concealed Schüco AvanTec SimplySmart stainless steel hardware. AvanTec SimplySmart Open Secure hardware additionally provides RC2 protection even in the tilted (ventilation) position.
What variants are available for AWS 90.SI+?+

Several variants are available: AWS 90 BS.SI+ (Block System) — a block system with a concealed sash for maximum transparency; AWS 90 AC.SI — an acoustic window with ventilation without street noise; WoodDesign — a wood-clad sash finish; Level Threshold — a version with a flush, barrier-free threshold.
What is the maximum glazing thickness?+

The system supports glazing units and panels up to 68 mm thick, including triple energy-saving units with a warm-edge spacer and a Ug coefficient of up to 0.5–0.6 W/m²K, as well as special safety glass.
What is the difference between Schüco AWS 90.SI+ and AWS 75.SI+?+

AWS 90.SI+ has a greater installation depth (90 mm versus 75 mm), a lower Uf coefficient (from 0.71 versus from 0.9 W/m²K), and official Passive House Institute certification. The system is aimed at projects requiring the maximum possible thermal insulation from an aluminium window, including passive house construction.
What are the maximum sash dimensions and weight?+

Sash height is 540–2500 mm, width is 470–1700 mm. Maximum sash weight is up to 250 kg. The mechatronic TipTronic hardware is designed for sashes weighing up to 160 kg.
What buildings is Schüco AWS 90.SI+ suitable for?+

The system is suitable for private houses and cottages built to the passive house standard, multi-family residential buildings, office and administrative buildings, and properties where energy efficiency is a project priority. Compatible with the Schüco ADS 90.SI door system for a unified architectural solution.
What colours are available for Schüco AWS 90.SI+?+

Any colour from the RAL scale is available, along with anodising, matte and textured finishes, two-tone execution (different colours outside and inside), and custom decorative finishes on request.

Schüco AWS 90.SI+ — detailed overview

Schüco AWS 90.SI+ (Aluminium Window System, Super Insulation) is a window system from the German manufacturer Schüco International KG, developed as the flagship thermal insulation solution within the AWS platform. Compared with the related AWS 75.SI+ system, the installation depth has been increased to 90 mm, allowing for an extended insulation zone and reducing the frame thermal transmittance Uf to 0.71 W/m²K — one of the best results among serial aluminium window systems available on the market.

The key distinction of AWS 90.SI+ from most aluminium systems is official certification by the independent Passive House Institute in Darmstadt, confirmed at a profile sightline width from 117 mm. This makes the system one of the few aluminium solutions officially approved for use in passive house construction projects without additional engineering compromises. Using triple glazing with Ug 0.6 W/m²K and a plastic spacer, the overall window coefficient Uw reaches 0.80 W/m²K on a reference sample measuring 1.23×1.48 m.

Burglar resistance up to class RC3 (WK3) under DIN EN 1627 is provided by the concealed Schüco AvanTec SimplySmart stainless steel hardware. The additional AvanTec SimplySmart Open Secure function maintains RC2 protection even in the tilted (ventilation) position — a rare capability among window systems of this class. For heavy, large-format constructions, mechatronic TipTronic SimplySmart hardware is available, designed for sashes weighing up to 160 kg and enabling automated ventilation, night cooling, and integration into smart home systems.

The AWS 90.SI+ model range includes several specialised solutions. The AWS 90 BS.SI+ block system, with a concealed sash and a minimum sightline width from 99 mm, provides maximum visual lightness of the facade with no visible sash contours. The AWS 90 AC.SI acoustic window allows rooms to be ventilated through convection cassettes at the top of the frame without letting in street noise — a solution in demand for properties near busy roads, airports and railways. The WoodDesign version combines a slim aluminium profile and SI+ thermal performance with a natural wood-clad sash finish on the interior side.

Sound insulation Rw up to 47 dB makes the system an effective tool for acoustic protection in urban environments. Maximum sash dimensions of up to 1700×2500 mm at a weight of up to 250 kg make it possible to create bright panoramic openings without loss of thermal performance. Glazing unit or panel thickness can reach 68 mm, opening up possibilities for the use of highly efficient triple units and special safety glass.

Schüco AWS 90.SI+ is compatible with the Schüco ADS 90.SI door system, ensuring a unified architectural and technological solution for windows and doors on the same property. The aluminium profile is resistant to corrosion, deformation and UV radiation over decades of service. Logi24 offers supply, professional installation and warranty service for Schüco AWS 90.SI+ across Europe.

AWS 90.SI+ Schüco

AWS 90.SI+ — Aluminium Windows