The Baxi Multifit 1 Metre Flue Extension (part number 103871) is a concentric flue duct component for extending the flue run on Baxi and Potterton ERP condensing boilers fitted with the Multifit flue system. This 60/100mm concentric extension provides an additional 1000mm of flue length where the standard terminal position cannot be reached. Manufacturer: Baxi Baxi Part Number: 103871 Length: 1 metre (1000mm) Flue System: Concentric 60/100mm (60mm inner flue / 100mm outer air duct) Connection Type: Push-fit with positive screw fixings for a secure joint Materials: White aluminium outer, polypropylene sulphide (PPS) inner Includes: Support bracket and fixing screws Compatible with: Baxi Multifit and Potterton ERP condensing boiler range Applications: Extending horizontal or vertical flue runs on condensing boilers