Ventilation box with double fan to ensure constant air supply: if one fan fails, the other is automatically activated. It has a 5 cm insulation, which makes it the quietest case and includes a non-return air system.
The fan speed is fully adjustable. In addition, its maintenance is very easy thanks to the large door that gives the unit room to manoeuvre.

| Model | V (50 Hz) | A | W | rpm | m³/h | Pa |
|---|---|---|---|---|---|---|
| TWINBOX 150 | 310 | |||||
| TWINBOX 200 | 310 | |||||
| TWINBOX 200 L | 390 | |||||
| TWINBOX 250 | 260 | |||||
| TWINBOX 250 L | 540 | |||||
| TWINBOX 315 G | 230 | |||||
| TWINBOX 315 L | 540 | |||||
| TWINBOX 315 XG | 225 | |||||
| TWINBOX 355 | 225 | |||||
| TWINBOX 400 | 225 |