Oval ventilation distributor system equipped with connectors with built-in seal. Available in 2 system diameters 102x50 and 140x50mm. The complete system can be used wherever there is little space to use, with a low concrete screed, suspended ceilings or in frame structures.

Recommended capacity of 1 connector:

• 102x50: 30m3/h (2.7m/s); 35m3/h (3.2m/s)
• 140x50: 45m3/h (2.9m/s); 50m3/h (3.2m/s) 

Two-layer oval channel:

Tunnel-shaped, impact-resistant, double-walled PE corrugated pipe with antistatic and antibacterial inner coating, for installation in the insulation layer, in suspended ceilings, installation walls, shafts or within frame structures.

• Low pressure losses
• Material: PE
• Antibacterial and antistatic properties
• High tightness class D/ATC 2 up to +/- 2000 Pa
• Bending radius for 102×50 vertically / horizontally: 150mm / 200mm
• Resistance temperature: -20 to +60st
• Installation temperature: +5 to +50st
• Maximum thickness of concrete screed on the pipe = 200mm
• Tested and certified by TÜV SÜD and ISEGA, compliant with REACH

More: 
https://www.inwestklima.com.pl/ovalvent-wentylacyjny-system-owalny-102x50-i-140x50/