/ Product catalogue / Commercial and industrial ventilation / Inline fans / For round ducts / KSD / KSD 250 S-4E
| Unit of measurement | KSD 250 S-4E | |
| Connected air duct size | mm | 250 |
| Minimum supply voltage | V | 230 |
| Maximum supply voltage | V | 230 |
| Power supply frequency | Hz | 50 |
| Rated power | W | 617 |
| Unit current | A | 2.69 |
| Maximum airflow | m3/h | 2470 |
| Sound pressure level LpA at 3 m | dB(A) | 46 |
| Weight | kg | 31.3 |
| Transported air temperature (max) | °С | 50 |
| Transported air temperature (min) | °С | -20 |
| Ingress protection rating | - | IPX4 |
| Trademark | Vents |
| Model | KSD 250 S-4E |
| Type of drive installed | External MSD or VSD |
| Type of heat recovery system | None |
| Nominal flow rate (m3/s) | 0.275 |
| Nominal external pressure (Pa) | 370 |
| Maximum external leakage rates (%) | 2.7 |
| Static efficiency (%) | 28.9 |
| Declared typology | NRVU UVU |
| Effective electric power input (kW) | 0.36 |
| Sound power level (dB(A)) | 66 |
| ∅D | ∅d | B | B1 | H | H1 | H2 | H4 | L | L1 | L2 |
|---|---|---|---|---|---|---|---|---|---|---|
| 248 | 20 | 503 | 450 | 483 | 340 | 241 | 520 | 638 | 540 | 470 |
