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



New building

Confortable and cost effective heating


A modern heating system proven many times over

Large scale projects

The potential called "efficiency"

Plumbers, Designers & Archtitects

As unique as the idea