MB-79N CSF – Outward-Opening Slim-Profile Window System
The Bertrand MB-79N CSF system represents the next generation of outward-opening slim-profile aluminum windows, designed to meet the highest expectations of clients in the UK, Ireland, and similar markets.
Combining advanced engineering with elegant proportions, MB-79N CSF offers a minimalist look, excellent thermal insulation, and superior functionality — the ideal choice for architects, developers, and homeowners who value both performance and refined aesthetics.
Slim Design and High Performance
With its thermally broken three-chamber profile, MB-79N CSF achieves the perfect balance between minimal frame visibility and strong insulation. The system supports a variety of configurations, including fixed, side-hung, and top-hung windows, and is available in two distinct aesthetic versions:
Flush version — where the sash and frame align on the exterior plane, creating a modern, uniform appearance.
Non-flush version — with a subtly offset sash, reminiscent of classic casement windows, emphasizing the architectural character of the façade.
MB-79N CSF is designed for flexibility, making it suitable for both residential and commercial applications. Two thermal-insulation variants are available:
MB-79N CSF ST – a cost-effective version offering solid thermal performance, ideal for standard projects.
MB-79N CSF SI – enhanced with insulating inserts positioned within the thermal barriers, delivering superior energy efficiency and comfort.
A groundbreaking feature of this system is its hybrid hinge, developed specifically for MB-79N CSF.
This advanced component supports sashes weighing up to 176 lb (80 kg), allowing larger and heavier windows to be manufactured without compromising on security, functionality, or durability.
It ensures smooth operation, extended service life, and design flexibility — a genuine innovation in the field of outward-opening aluminum windows.
Advantages for fabr
icators:
Streamlined production – optimized design reduces manufacturing time and simplifies assembly.
Versatile applications – enables fabrication of fixed, side-hung, and top-hung windows in both flush and non-flush designs.
Competitive edge – the hybrid hinge provides a unique technological advantage in markets where slimline, high-load casements are in demand.
Advantages for architects:
Minimalist aesthetics – slim sightlines and a broad color palette complement modern façade designs.
Design flexibility – two exterior styles (flush or non-flush) adapt to different architectural visions.
Energy efficiency – meets advanced energy-saving and environmental standards.
Advantages for developers and homeowners:
Lower energy costs – outstanding insulation minimizes heat loss and improves comfort.
Enhanced safety and comfort – optional anti-burglary fittings and high-performance glazing options.
Long-term durability – weather-resistant aluminum profiles available in anodized or powder-coated finishes ensure years of reliable use.
| Parameter | Value |
|---|---|
| Minimum visible frame width (fixed) | 1.39 in (35.2 mm) |
| Minimum visible sash width (operable) | 2.38 in (60.5 mm) |
| Maximum sash weight | 176 lb (80 kg) |
| Profile structure | 3-chamber, thermally broken |
| Thermal variants | ST and SI |
| Opening types | Fixed, side-hung, top-hung |
| Aesthetic options | Flush or non-flush sash |
| Glazing thickness | up to 2.48 in (63 mm) |
| Compatible hardware | Hybrid hinge + standard “Euro” groove fittings |
| Typical thermal performance (Uw) | from 0.97 W/(m²·K) with triple glazing (ST), down to 0.93 W/(m²·K) for SI variant |
COLORS
Choose a color from our rich palette and shape the windows according to your ideas.
