Aluminium window system
MB-79N SI
Choose energy efficiency.
MB-79N SI is a new-generation aluminium window system with increased thermal insulation. Insulating inserts and a two-component central gasket help reduce heat loss, while contemporary design, more than 200 RAL colours and numerous options make the system suitable for demanding projects.
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0.81Uw W/(m²K)*
70 mmInstallation depth
3Chambers
2EPDM gaskets
Key features
A system designed for everyday comfort
- ✓Insulating inserts and a two-component central gasket
- ✓MACO MULTI-MATIC KS hardware with two anti-theft strikers
- ✓Microventilation in tilt-and-turn windows
- ✓More than 200 RAL colours and an optional 25 mm renovation frame
Window cross-section

Technical data
MB-79N SI specification table
| Number of chambers | 3 |
|---|---|
| Installation depth | 70 mm |
| Thermal transmittance | Uw = 0.81 W/(m²K)* |
| Thermal insulation | Insulating inserts and a two-component central gasket |
| Sealing | Two EPDM gaskets: one standard and one central foamed EPDM gasket; black |
| Standard glazing | Argon-filled double glazing, Ug = 1.1 W/(m²K) |
| Glazing spacer | Galvanised steel; Swisspacer Ultimate warm edge available as an option |
| Hardware | MACO MULTI-MATIC KS with Silber-Look anticorrosion coating |
| Security | Two anti-theft strikers as standard |
| Comfort | Microventilation and sash lifter depending on window height |
| Handle | Aluminium |
| Standard colours | Matt white RAL 9016 and matt anthracite RAL 7016 |
| Colour range | More than 200 RAL colours, textures and special effects |
| Renovation | Optional 25 mm renovation frame for installation without removing the old window frame |
* Uw = 0.81 W/(m²K) is the system value stated by the manufacturer; actual performance depends on window dimensions, glazing and configuration.
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