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VENTIPIPE® wall bushings have been officially tested and are approved under approval no. Z-7.4-3361 generally approved by the building authorities. Flue pipes may only be passed through walls with flammable building materials if it is prevented that the surface temperatures of flammable components do not rise to an unacceptably high level. VENTIPIPE® wall bushings are available in different versions for this application:
- fixed lengths for wall thicknesses up to 520mm
