• Flue systems concentric Ø 60/100 in polypropylene (PP/PPu)
• Air side Ø 100 in Polypropylene with UV protection component (PPu)
• Male/female junction between components for fast and safety closure
• EPDM peroxide black gasket (condensate resistant) on flue side and EPDM gasket on air side
• Plastic clamp closure at boiler junction.