Location of Flues near Entry Points
This is an exttrcat from our Domestic Gas Fitting Handbook.
- No possible entry points are permitted in the shaded areas other than doors into
the property that are more than 1.2m measured horizontally away from the flue terminal.
BS5440-1: 2000 states: "terminals shall not be sited in covered passageways
between buildings".
Therefore, it is not acceptable to position a new flue terminal within a ginnell
or similar passageway. However, existing installations may be encountered were the
flue terminal is sited in a ginnell, requiring the operative to carry out a risk
assessment, which may possibly lead to relocation of the flue terminal in cases
where an unsafe situation is evident.
The diagrams should be used for guidance only as it is difficult to describe every
eventuality.
Risk Assesment Guidance
It can be seen from the diagrams that important considerations are: possible entry
points above the level of an imaginary horizontal line drawn along the bottom of
the terminal along the length of the passageway (for example, windows, air vents,
gaps, cracks, etc); and if there are lintels in the passageway, is the top of the
terminal above the level of a horizontal line drawn along the bottom of the lowest
lintel?
Other considerations are doors or gates at each end of the passageway that could
prevent air movement through the passageway.
Further advice or guidance may be obtained from the Gas Safe Gas Safety Helpline on
0870 401 2400.
- Top of flue terminal should not penetrate the shaded area.