What do I have to consider for the flue?
Correct selection and sizing of the flue is very important for the efficient functioning of the heating system. The cross-sectional area of flue required depends on different factors such as the nominal heating rate and the effective height of the flue. We recommend obtaining a calculation from the flue manufacturer.
However, a rule of thumb is:
In new buildings the installation of a corrosion-resistant flue is absolutely essential. For renovation of an existing flue or chimney different systems are available from various manufacturers – please ask your heating engineer or contractor for further information.
|Nominal heating rating||Cross-sectional area of the chimney|
|Up to 10 kW||14 cm|
|10 to 20 kW||14 to 16 cm|
|20 to 30 kW||16 cm|