The WT75 Aluminium Thermal Window & Door System represents the pinnacle of innovation and performance in modern architectural solutions. With its sleek, flat aesthetic and cutting-edge thermal insulation technology, it offers the ultimate combination of energy efficiency, durability, and contemporary design.
Key Features and Specifications
Performance Highlights
This system exemplifies FINEASTRA’s commitment to modularity and efficiency, offering unparalleled flexibility and value from production to installation. Perfectly suited for both residential and commercial applications, the WT75 and WT75 PLUS systems deliver the ideal blend of performance, cost-effectiveness, and aesthetic appeal.



| Version 1.4mm | |||||
|---|---|---|---|---|---|
| Specifications | Min. mm | Max. mm | Performance | ||
| Frame Width | 67 | 78 | Watertightness | EN 1027 | Class 3A |
| Sash Width | 74.5 | 74.5 | Resistance to wind load | EN 12211 | Class C5 |
| Glass Thickness | 26 Double Glazing | 54 Double Glazing | Air Permeability | EN 1026 | Class 3 |
| Version 1.4mm | |||||
|---|---|---|---|---|---|
| Specifications | Min. mm | Max. mm | Performance | ||
| Frame Width | 67 | 78 | Watertightness | EN 1027 | Class 3A |
| Sash Width | 74.5 | 74.5 | Resistance to wind load | EN 12211 | Class C5 |
| Glass Thickness | 26 Double Glazing | 54 Double Glazing | Air Permeability | EN 1026 | Class 3 |
| Version 2.0mm | |||||
|---|---|---|---|---|---|
| Specifications | Min. mm | Max. mm | Performance | ||
| Frame Width | 67 | 78 | Watertightness | EN 1027 | Class 3A |
| Sash Width | 74.5 | 74.5 | Resistance to wind load | EN 12211 | Class C5 |
| Glass Thickness | 26 Double Glazing | 54 Double Glazing | Air Permeability | EN 1026 | Class 3 |