UNI-PPA flexible consists of flue-gas evacuating plastic pipes (polypropylene). The pipes are available for installation inside the shaft.
Here you can download all relevant data in different file formats.
In Europe, more than 40% of the CO2 emissions are caused by buildings. To update the whole heating system is one of the most important measures, to protect our environment sustainable.
cf. Prof. Rainer Hirschberg , VDI Nachrichten, Aachen 2006