ARS-77 Slim

The ARS-77 Slim has been conceived as a high-performance window system, designed for projects where architectural design makes a real difference, combining advanced technology with a carefully defined aesthetic.

It is characterised by a 75 mm visible sash-to-frame section, one of the most reduced on the market, enabling an exceptionally slender profile and a larger glazed area. This enhances natural light ingress and provides a sense of visual lightness to the overall composition.

Its industrial-inspired design, reinterpreted in aluminium with strong lines and a stepped geometry, evokes traditional steel joinery. This aesthetic makes it well suited to contemporary projects, refurbishments, and spaces with an industrial or Art Deco style.

From a technical perspective, it incorporates a 34 mm thermal break, EPDM gaskets and polyethylene foams, ensuring excellent thermal and acoustic insulation. With Uf values of 1.6 W/m²K and Uw values as low as 0.8 W/m²K, together with features such as concealed hardware, micro-ventilation and a concealed frame with drainage, it delivers efficiency, comfort and streamlined fabrication within the ARS platform.

Contact

Technical information

Performance

Openings

Benefits

Downloads

Maximum recommended dimensions (hinged): 1500x3000 mm/sash

Maximum recommended dimensions (tilt-and-turn): 1400x2600 mm/sash

Maximum recommended weight: 180 kg/sash

Maximum glazing : 59 mm

Polyamide: 34 mm

Euro groove hardware

75 mm visible sash-to-frame section: ultra-compact design

Industrial aesthetic: inspired by steel joinery

Optional concealed hardware and micro-ventilation

Frame with concealed drainage option

Central gasket in EPDM foam and cellular polystyrene foams

Safety wedge for load optimisation

Full compatibility with the ARS platform for standardised fabrication

Air permeability*	UNE-EN 1026:2017; UNE-EN 12207:2017	Class 4
Water tightness*	UNE-EN 1027:2017; UNE-EN 12208:2000	Class E2400
Wind load resistance*	UNE-EN 12211:2017; UNE-EN 12210:2017	Class C5
Thermal insulation Uw**	UNE-EN 10077-1:2017	Up to 0.8 W/m²K
Sound insulation Rw	UNE-EN ISO 10140-2:2011	44 dB (-1;-3)

* Specifications of 2-sashes window of 1230×1480 mm

** Specifications of a 1-sash window of 1100×2200 mm

Design

The ARS-77 Slim stands out for its 75 mm visible section and stepped aesthetic, designed to replicate the appearance of steel joinery in aluminium. It allows glazing units of up to 59 mm, maximising natural light ingress and delivering a strong, well-defined architectural expression.

Features

The system incorporates a 34 mm thermal break, a central EPDM gasket and cellular polyethylene foams, enhancing both thermal performance and watertightness. The safety wedge ensures correct load distribution on the hardware. The internal glazing bead facilitates manufacturing processes.

Performance

It is distinguished by its high thermal and acoustic efficiency, with Uw values as low as 0.8 W/m²K, Uf values of 1.6 W/m²K and sound insulation up to 44 dB (-1;-3). It also achieves excellent results in AEV testing (Class 4 / E2400 / C5), ensuring optimal performance in demanding conditions.

Options

The ARS-77 Slim integrates options such as concealed hardware, micro-ventilation and a frame with concealed drainage, allowing the system to be adapted to different technical and aesthetic requirements without compromising its design identity.

Technical sheet

Technical manual

Register in our digital space Exlabesa 360 to have TechDocs at your disposal: a complete documentary library with all the technical information about Exlabesa Architecture’s aluminium systems.

Access Exlabesa 360 and enjoy exclusive content and functionalities:

Catalogues, tests, reports, sections, DAP, BIM objects…
Thermal and acoustic transmittance calculations.
Up to date information

Exlabesa 360