Reynaers Aluminium presents its SlimLine 38 High Insulation + (HI+), a versatile inward and outward opening window system that combines passive comfort levels with a sleek, minimalistic steel aesthetic. Building on the widely acclaimed SlimLine 38 series, the system allows for 3-metre-tall opening vents across all popular variants – Classic, Cubic, Ferro – as well as the newly introduced Functional design, offering architects and homeowners unprecedented flexibility in modern design.
The system meets today’s strict architectural and energy standards, delivering passive insulation levels with Uw values down to 0.74 W/m²K while maintaining the slim, elegant profiles that define the SlimLine series. In addition to its high performance, the system incorporates burglary protection (RC 2 + PAS24), providing both safety and peace of mind.
SlimLine 38-HI+ is also fully compatible with MasterLine 8 flush doors and residential pivot doors, accommodating both inward and outward opening applications, which makes it suitable for a wide range of residential and commercial projects.
Ease of assembly is at the heart of its design. The system features reinforced glass supports with large ridges, concealed hinges for airtight installation, and dedicated drainage components that simplify fabrication. These thoughtful design elements reduce the risk of errors in the workshop while ensuring a consistent, high-quality finish for end users. 
Sustainability remains a key priority for Reynaers Aluminium. SlimLine 38-HI+ uses 100% recycled insulation bars and minimal EPDM, earning a Cradle to Cradle® Bronze certificate and one of the lowest embodied carbon footprints in the company’s product range. According to Arend Jespers, Team Leader Product Management, the system not only achieves passive energy performance but also reduces operational carbon impact, aligning with the growing focus on environmentally responsible building solutions.
Combining slim aesthetics, high performance, ease of installation, and sustainability, SlimLine 38-HI+ represents a forward-looking choice for architects, builders, and homeowners who want both style and functionality. Its design proves that exceptional performance does not require compromise, offering a solution that is both beautiful and responsible, and capable of shaping the future of modern construction.
Source: Reynaers Aluminium with additional information added by Glass Balkan
