The Intergas vertical flue kit is a concentric flue consisting of a 60 mm diameter inner flue and a 100 mm diameter outer duct as standard. The flue can be installed and extended to a total length of up to 10 metres from the boiler to its final termination point. However, for every 45 degree flue bend used you should reduce the maximum length by 1 metre and for every 90 degree flue bend used reduce maximum length by 1. 5 metres.

Brand Name	Intergas