installation
Connecting the Flue
Flue System
The provision for satisfactory flue termination must be made as described in BS
The appliance must be installed so that the flue terminal is exposed to outdoor air.
The terminal must not discharge into another room or space such as an outhouse or
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 2 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 obstructions and ventilation openings are specified in Fig. 1.
Where 2 or more vertical fanned draught chimney configurations teminate in close proximity at the same height they shall be separated by at least 300mm. Where any 1 vertical outlet is more than 300mm above the other, then they shall be separated by at least 1500mm.
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 | 200 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 | 600 mm |
- I From a terminal facing a terminal | 1200 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 |
|
See table |
180 |
See table on page 22 |
4 |
118mm |
Fig. 2 |
Warning
The exhaust gas ducts must not be in contact with or close to inflammable material and must not pass through building structures or walls made of inflammable material.
When replacing an old appliance, the flue system must be changed.
Important
Ensure that the flue is not blocked.
Ensure that the flue is supported and assembled in accordance with these instructions.
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