/ Product catalogue / Commercial and industrial ventilation / Accessories for ventilating systems / Heaters / Electrical heaters / NK (rectangular) / NK 500x250-21,0-3
| Unit of measurement | NK 500x250-21,0-3 | |
| Minimum supply voltage | V | 400 |
| Maximum supply voltage | V | 400 |
| Power supply frequency | Hz | 50 |
| Rated power | W | 21000 |
| Weight | kg | 7.65 |
| B | B1 | B2 | H | H1 | H2 | L |
|---|---|---|---|---|---|---|
| 500 | 520 | 640 | 250 | 270 | 290 | 200 |
