This Vokera 350mm - 500mm Telescopic Flue Extension from Vokera is for 100mm Diameter Concentric Flues and Suitable for the following Condensing Boilers:
- Vokera Linea HE
- Vokera Syntesi HE
- Vokera Unica HE
- Vokera Compact HE
- Vokera Synergy HE
- Vokera Mynute HE