Technical data

1919
Horizontal and vertical flue terminal positioning
16
600
300
200
300
1,200
Boundary Line
1,500
1,500
2
1
12
11
10
9
5
18
7
6
13
15
4
3
17
14
300
300
300
300
300
300
300
500
600
300
600
600
400
300
25
8
300
500
600
300
25
2
25
16
2m
1m
52mm
104mm
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.
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 snowfall.
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.
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.
•
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.