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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.
Supplied By www.heating spares.co Tel. 0161 620 6677
4 S ee table on page 1
Fig.
Fig. 1
- A Directly below an opening, window, etc
- B Horizontally to an opening, window, etc
- C Below gutters, soils pipes or drain pipes
- D Below eaves
- E From vertical drain pipe or soil pipe
- F From internal or external corner
- G Above ground, roof or balcony level
- H From a surface facing the terminal
- I From a terminal facing a terminal
- J Vertically from a terminal on the same wall
- K Horizontally from an terminal on the same wall
- L Fixed by vertical flue terminal
180
118 mm
installation
300 mm
300 mm
75 mm
00 mm
75 mm
300 mm
300 mm
500 mm
500 mm
1500 mm
300 mm
See table
15
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