| Unit of measurement | VOK 4E 250 | |
| Connected air duct size | mm | 250 |
| Minimum supply voltage | V | 220 |
| Maximum supply voltage | V | 240 |
| Power supply frequency | Hz | 50/60 |
| Rated power | W | 50 |
| Unit current | A | 0.22 |
| Maximum airflow | m3/h | 800 |
| Sound pressure level LpA at 3 m | dB(A) | 55 |
| Weight | kg | 7 |
| Transported air temperature (max) | °С | 60 |
| Transported air temperature (min) | °С | -30 |
| Ingress protection rating | - | IP24 |
| Ingress protection rating of the drive | - | IP44 |
| Trademark | Vents |
| Model | VOK 4E 250 |
| Type of drive installed | External MSD or VSD |
| Type of heat recovery system | None |
| Nominal flow rate (m3/s) | 0.085 |
| Nominal external pressure (Pa) | 56 |
| Maximum external leakage rates (%) | 2.7 |
| Static efficiency (%) | 8.9 |
| Declared typology | NRVU UVU |
| Sound power level (dB(A)) | 75 |
| Effective electric power input (kW) | 0.054 |
| ∅D | ∅D1 | H | L | L1 |
|---|---|---|---|---|
| 262 | 405 | 280 | 425 | 330 |
