RECTANGULAR DUCT TYPE FD FIRE DAMPERS
| Code | Standard Sizes | Air Flow Volume |
| mm | m³/h | |
| 10400501 | 200 x 150 | 260 |
| 10400502 | 200 x 200 | 475 |
| 10400503 | 300 x 200 | 885 |
| 10400504 | 300 x 300 | 1.470 |
| 10400505 | 400 x 300 | 2.000 |
| 10400506 | 400 x 400 | 2.830 |
| 10400507 | 600 x 400 | 4.320 |
| 10400508 | 800 x 400 | 5.810 |
| 10400509 | 800 x 500 | 7.495 |
| 10400510 | 900 x 500 | 8.470 |
| 10400511 | 900 x 600 | 10.350 |
| 10400512 | 1.200 x 800 | 18.900 |
| 10400513 | 1.400 x 800 | 22.200 |