Offset with cross-section change
Product features:
- Made from Z275 DX51 galvanized steel sheet, in accordance with PN-EN 1505 and PN-EN 1507 standards
- Available in tightness classes A and B (acrylic seals on corners, seams, and frames)
- Connections are made using a frame of profiles and ventilation corners compliant with standards
- Sheet thickness and frame size adapted to duct dimensions
- Rectangular duct module: standard length L = 1500 mm
- Fittings with a surface area below 1 m² are calculated as elements with a surface area of 1 m² (according to DIN 18379)
- Possibility of manufacturing elements in various custom dimensions
- Corrosion resistance due to DX51D+Z275 MAC non-spangle galvanized coating
Duct Tightness Classes
| Duct tightness class | Leakage indicator limit value (fmax) m³·S⁻¹·m⁻² |
Static pressure limit value (ps) [Pa] | |||
|---|---|---|---|---|---|
| Negative pressure in a given class | Positive pressure class 1 | Positive pressure class 2 | Positive pressure class 3 | ||
| A | 0,027 × ptest, 0,65 × 10⁻³ | 200 | 400 | – | – |
| B | 0,009 × ptest, 0,65 × 10⁻³ | 500 | 400 | 1000 | 2000 |
Rectangular ducts and fittings are ventilation system components made of high-quality galvanized sheet metal, complying with Polish and European standards. Offered in tightness classes A and B, they ensure durability, airtightness, and easy installation thanks to the use of ventilation frames and corners. The standard module length is 1500 mm, and the possibility of manufacturing custom-sized elements allows the product to be adapted to individual installation needs.
Dimensions [mm]
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