491
The built-in wall vents 491 are equipped with storm blinds. They are attached invisibly in the wall opening with wall anchors or clip springs (small dimensions).
Are used for applications the require a good water-resistance and low air flow, or where there is a lot of wind.
Zalety produktu
- Dobra ochrona przed wnikaniem
- Dobra odporność na wodę o przepływie
- Konstrukcja odporna na sztorm
- Odporność na śnieg
Specifications based on your calculation
Technical Specifications
| Physical Free Passage (%) | 26 |
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| slat step (mm) | 33.3 |
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| technical.standaardgaastype | - |
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| technical.ip_klasse | IP2XD |
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| Depth to fit (mm) | 29 |
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| Total louvre depth (mm) | 34 |
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| K-factor (entry) | 123 |
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| CE coefficient | 0.09 |
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| K-factor (discharge) | 118 |
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| CD coefficient | 0.092 |
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| Water resistance at 0 m/s (%) | - |
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| Water resistance at 0,5 m/s (%) | - |
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| Water resistance at 1,0 m/s (%) | - |
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| Water resistance at 1,5 m/s (%) | - |
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| Water resistance at 2,0 m/s (%) | - |
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| Water resistance at 2,5 m/s (%) | - |
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| Water resistance at 3,0 m/s (%) | - |
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| Water resistance at 3,5 m/s (%) | - |
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