Air curtain for cold rooms with temperatures above 0º and which has been designed with a tangential turbine, which provides a homogeneous air flow. It is equipped with a stepless regulator, which allows the regulation of the curtain not to be carried out in stages, but to calibrate the air speed continuously, adapting it to each installation.

| Modell | m³/h | m |
|---|---|---|
| OPT K 1000 A | 3 | |
| OPT K 1500 A | 3 | |
| OPT K 2000 A | 3 |