| 445/86, Acoustic wall louvre | 34 % | 77 % |
| 446/150, Acoustic wall louvre | 34 % | 54 % |
| 446/225, Acoustic wall louvre | 34 % | 54 % |
| 446/300, Acoustic wall louvre | 34 % | 54 % |
| 447/150, Acoustic wall louvre | 37 % | 59 % |
| 447/225, Acoustic wall louvre | 37 % | 59 % |
| 468AK/1, Interior acoustic wall louvre | 29 % | 29 % |