Turbo double-wall elbow SpiroFlex 80/125 45° for ducting

SpiroFlex turbo double-wall elbow 80/125 45° is a concentric ducting component designed for turbo and forced-ventilation flue systems. It provides a sealed 45° transition between an 80 mm inner duct and a 125 mm outer duct, maintaining double-wall construction for improved thermal isolation and safe exhaust routing. The elbow is intended for installations where a compact directional change is required while preserving the concentric layout of intake and exhaust paths.

Advantages

The double-wall design separates the inner exhaust channel from the outer air or intake jacket, reducing heat transfer and improving safety in close-clearance installations. The 45° angle allows a smoother directional change compared with sharper bends, lowering flow resistance and reducing noise. Concentric configuration ensures correct alignment of the inner and outer ducts for turbo or balanced flue systems, and the sealed junction reduces leak potential at the change of direction.

Suitable for

• Turbo/concentric flue systems with 80 mm inner and 125 mm outer ducts
• Forced-ventilation or mechanical extract installations
• Exhaust routing where a compact 45° directional change is needed
• Installations requiring separated inner exhaust and outer air jacket

Key specifications

• Inner duct diameter: 80 mm
• Outer duct diameter: 125 mm
• Angle: 45°
• Construction: double-wall, concentric elbow
• Function: sealed angled transition between inner and outer ducts

How to use

Position the elbow between corresponding 80 mm inner and 125 mm outer ducts, ensuring concentric alignment of the inner and outer tubes. Secure connections according to system requirements, using the compatible clamps, seals or locking features specified for the ducting system. Verify the orientation of the 45° bend to achieve the intended direction change and confirm that joints are properly sealed to maintain system pressure and prevent leakage.

Usage recommendations

Install the elbow in accessible locations to allow inspection and maintenance. Follow local ventilation and flue installation standards, ensure clearance to combustible materials where required, and use appropriate sealing and fixation methods recommended for turbo/concentric systems to maintain safe operation and efficient air flow.