Text From Bs 5440-1 On Fan-Supported Flue Gas Pipes; Opening Of The Flue Pipe Below Eaves And Balconies - Vaillant ecoTEC plus Installation And Maintenance Instructions Manual

Appendix
H.2

Text from BS 5440-1 on fan-supported flue gas pipes

BS 5440–1: It is recommended that the fanned flue gas system terminal is positioned as follows:
–
At least 2 m from an opening in the building directly opposite, and
–
So that the combustion products are not discharged directly across a property boundary.
–
Dimensions D, E, F and G: These clearances may be reduced to 25 mm without affecting the performance of the boiler.
In order to ensure that the condensate vapour plume does not damage adjacent surfaces, the terminal should be exten-
ded as shown.
–
Dimension H: This clearance may be reduced to 25 mm without adversely affecting the performance of the boiler. How-
ever, in order to ensure that the condensate vapour plume does not damage adjacent surfaces, a clearance of 300 mm is
preferred. For IE, recommendations are given in the current issue of the IS 813.
H.3

Opening of the flue pipe below eaves and balconies

The flue pipe must
Adequately secured
protrude beyond any overhang
air/flue gas pipe
34
Balcony/eaves
Gutter
Installation and maintenance instructions ecoTEC plus 0020200871_00