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15
installation
Connecting the Flue
Flue System
The provision for satisfactory flue termination must be made as
described in BS 5440-1.
The appliance must be installed so that the flue terminal is expo-
sed to outdoor air.
The terminal must not discharge into another room or space
such as an outhouse or lean-to.
It is important that the position of the terminal allows a free
passage of air across it at all times.
The terminal should be located with due regard for the damage
or discolouration that might occur on buildings in the vicinity, it
must also be located in a place not likely to cause nuisance.
In cold or humid weather water vapour may condense on leaving
the flue terminal.
The effect of such “steaming” must be considered.
If the terminal is less than metres above a balcony, above
ground or above a flat roof to which people have access, then a
suitable stainless steel terminal guard must be fitted.
The minimum acceptable spacing from the terminal to obstruc-
tions and ventilation openings are specified in Fig. 1.
- A Directly below an opening, window, etc
300 mm
- B Horizontally to an opening, window, etc
300 mm
- C Below gutters, soils pipes or drain pipes
75 mm
- D Below eaves
00 mm
- E From vertical drain pipe or soil pipe
75 mm
- F From internal or external corner
300 mm
- G Above ground, roof or balcony level
300 mm
- H From a surface facing the terminal
500 mm
- I From a terminal facing a terminal
500 mm
- J Vertically from a terminal on the same wall
1500 mm
- K Horizontally from an terminal on the same wall
300 mm
- L Fixed by vertical flue terminal
118 mm
See table
118 mm
4
See table on page 1
Fig.
Fig. 1
180
