/ Product catalogue / Commercial and industrial ventilation / Roof exhaust fans / Axial / VOK / VOK 4E 250
| Unit of measurement | VOK 4E 250 | |
| Connected air duct size | mm | 250 |
| Phases | - | 1 |
| 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 |
| Rotation speed at 50hz | - | 1380 |
| 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 |
| Impeller material | - | Coated steel |
| Size | mm | 250 |
| Trademark | Vents |
| Model | VOK 4E 250 |
| Type of drive installed | External MSD or VSD |
| Type of heat recovery system | None |
| Nominal external pressure (Pa) | 56 |
| Maximum external leakage rates (%) | 2.7 |
| Static efficiency (%) | 8.9 |
| Declared typology | NRVU UVU |
| Effective electric power input (kW) | 0.054 |
| Sound power level (dB(A)) | 75 |
| ∅D | ∅D1 | H | L | L1 |
|---|---|---|---|---|
| 262 | 405 | 280 | 425 | 330 |
| Name | Photo | Description |
|---|---|---|
| Vents RSA5E-3,5-T |
|
Speed controllers are applied for air flow control of single phase fans by means of motor step speed control |
| Vents RSA5E-5,0-T |
|
Speed controllers are applied for air flow control of single phase fans by means of motor step speed control |
| Vents RSA5E-7,5-T |
|
Speed controllers are applied for air flow control of single phase fans by means of motor step speed control |
| Name | Photo | Description |
|---|---|---|
| Vents RKV 250-315 |
|
Mounting frame |
| Vents RKVI 250-315 |
|
Mounting frame with thermal-insulating layer |
