The terminal should be positioned so that products of
combustion can safely disperse at all times.
pluming may occur at the termination so, where
possible, terminal positions where this could cause a
nuisance should be avoided.
Minimum dimensions are shown below
Terminal position Minimum Dimension
Directly below an opening,
air brick, windows, etc. 300 mm
Below plastic / painted gutters 300 mm
Painted surface 300 mm
Below eaves or balcony 500 mm
Below velux windows 2000mm
Above or side of velux windows 600mm
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