/ Product catalogue / Commercial and industrial ventilation / Radial fans / Radial fans / Helix / Helix 250x140 4E
| Unit of measurement | Helix 250x140 4E | |
| Minimum supply voltage | V | 230 |
| Maximum supply voltage | V | 230 |
| Power supply frequency | Hz | 50 |
| Rated power | W | 570 |
| Unit current | A | 2.48 |
| Maximum airflow | m3/h | 2000 |
| Sound pressure level LpA at 3 m | dB(A) | 60 |
| Weight | kg | 16.3 |
| Transported air temperature (max) | °С | 70 |
| Transported air temperature (min) | °С | -40 |
| Ingress protection rating | - | IPX4 |
| Ingress protection rating of the drive | - | IP44 |
| Impeller material | - | Galvanized steel |
| Article | - | 8016004 |
| Trademark | Blauberg |
| Model | Helix 250x140 4E |
| Type of ventilation unit | Unidirectional |
| Type of drive installed | External MSD or VSD |
| Type of heat recovery system | None |
| Nominal flow rate (m3/s) | 0.303 |
| Nominal external pressure (Pa) | 286 |
| Maximum external leakage rates (%) | 2.7 |
| Static efficiency (%) | 22.7 |
| Sound power level (dB(A)) | 80 |
| Effective electric power input (kW) | 0.389 |
| Declared typology | NRVU UVU |
| ∅ D | B | H | H1 | H2 | L | L1 | L2 | P | M |
|---|---|---|---|---|---|---|---|---|---|
| 250 | 410 | 485 | 230 | 191 | 205 | 230 | 197 | 238 | 270 |
