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4.9
Flue terminal positions
All measurements in millimetres
3
600
1,500
2
1
300
1,500
1,200
Boundary Line
Fig. 17 Flue terminal positions
NOTICE:
▶ All measurements are the minimum clearances required.
▶ Terminals must be positioned so to avoid combustion products entering the building.
▶ Support the flue at approximately one metre intervals and at a change of direction, use suitable brackets and fittings.
(flue bracket 100mm part number: 7 716 191 177,
flue brackets 100mm x 6 part number: 7 716 191 178,
flue bracket 125mm part number: 7 716 191 179).
Key to illustration
1. 300mm adjacent to a boundary line.
2. The dimension below eaves, gutters, pipes and drains can be
reduced to 25mm, as long as the flue terminal is extended to clear
any overhang. External flue joints must be sealed with suitable
silicon sealant.
3. 1,500mm between a vertical flue terminal and a window or dormer
window.
4. 1,200mm between terminals facing each other.
5. Vertical flue clearance, 300mm adjacent to a boundary line unless it
will cause a nuisance. BS 5440:Part 1 recommends that care is
taken when siting terminal in relation to boundary lines
6. 600m distance to a boundary line, unless it will cause a nuisance.
BS 5440:Part 1 recommends that care is taken when siting terminal
in relation to boundary lines.
7. 600mm minimum clearance from a skylight to a vertical flue.
8. Vertical flue clearance, 500mm to non-combustible building
material, and 1,500mm clearance to combustible building material.
9. 300mm above, below and either side of an opening door, air vent or
opening window.
10. 600mm diagonally to an opening door, air vent or opening window.
11. 300mm to an internal or external corner. This does not apply to
building protrusions less than 450mm.
12. 2,000mm below a Velux window, 600mm above or to either side of
the Velux window.
13. 400mm from a pitched roof or 500mm in regions with heavy snow
fall.
14. 500mm clearance to any vertical structure on a roof, 600mm to
room sealed flue or 1,500 to an open flue.
15. 200mm below eaves and 75mm below gutters, pipe and drains.
CDi Compact
ErP
- 6 720 813 276 (2015/07)
2
25
5
7
300
600
600
300 300
6
4
2m
1m
52mm
104mm
300
12
300
8
500
10
600
9
11
300 300
25
300
300
16. The dimension below eaves, balconies and car ports can be
reduced to 25mm, as long as the flue terminal is extended to clear
any overhang. External flue joints must be sealed with suitable
silicon sealant.
17. Flue clearance must be at least 300mm from the ground. Terminal
guards must be fitted if the flue is less than 2 metres from the
ground or if a person could come into contact with the flue
terminal.
18. 600mm distance to a surface facing a terminal, unless it will cause
a nuisance. BS 5440: Part 1 recommends that care is taken when
siting terminals in relation to surfaces facing a terminal.
Note:
▶ Installations in car ports are not recommended.
▶ The flue cannot be lower than 1,000mm from the top
of a light well due to the build up of combustion
products.
▶ Dimensions from a flue terminal to a fanned air inlet
to be determined by the ventilation equipment
manufacturer.
▶ A flue terminal guard should be fitted over a terminal,
if persons could come into contact with the terminal,
or it could be subject to damage and where the
terminal is less than 2,000mm from the finished floor
level.
PRE-INSTALLATION
25
16
13
400
500
14
200
15
300
18
600
16
17
300
300
21
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