Intake for medium and low pressure supply and exhaust systems as the end of ventilation ducts, for outside air.
The construction is made of steel. From the inside, a 10×10 galvanized mesh is attached. The base ends with a channel profile.
Made of galvanized sheet.
| AxB [mm] | A1 [mm] | B2 [mm] | H [mm] | H1 [mm] | H2 [mm] |
| 250×250 | 340 | 340 | 500 | 300 | 30 |
| 250×400 | 340 | 490 | 500 | 300 | 35 |
| 250×630 | 340 | 720 | 500 | 300 | 35 |
| 400×400 | 490 | 490 | 600 | 300 | 45 |
| 400×630 | 490 | 720 | 600 | 300 | 45 |
| 630×630 | 720 | 720 | 700 | 300 | 70 |
| 630×1000 | 720 | 1090 | 700 | 300 | 85 |
| 630×1600 | 720 | 1690 | 800 | 300 | 95 |
| 1000×1000 | 1090 | 1090 | 1100 | 300 | 100 |
| 1000×1600 | 1090 | 1690 | 1100 | 300 | 105 |