Key
Description
mm
Key
Description
mm
D
Below gutters, soil pipes or drain pipes
25 (75)
M
Vertically from a terminal on the same
wall
1500
Below eaves
25 (200)
N
Horizontally from a terminal on the
same wall
300
Below balconies or car port roof
25 (200)
R
From adjacent wall to flue (vertical on
ly)
300
G
From a vertical drain pipe or soil pipe
25 (150)
S
From an adjacent opening window
(vertical only)
1000
H
From an internal or external corner
25 (300)
T
Adjacent to windows or openings on
pitched and flat roofs
600
I
Above ground, roof, or balcony level
300
U
Below windows or openings on pitch
ed roofs
2000
(1) In addition, the terminal should be no nearer than 150mm to an opening in the building fabric formed for the purpose of accommodating
a built-in element such as a window frame.
(2) Only ONE 25mm clearance is allowed per installation. If one of the dimension D,E,F,G or H is 25mm then the remainder MUST be as
shown in brackets, in accordance with BS 5440–1.
Important
Under car ports we recommend the use of the plume
displacement kit. The terminal position must ensure the safe and
nuisance - free dispersal of combustion products.
If the terminal discharges onto a pathway or passageway, check that
combustion products will not cause a nuisance and that the terminal will
not obstruct the passageway.
If a terminal is less than 2 metres above a balcony, above ground or
above a flat roof to which people have access, then a suitable terminal
guard must be provided.
1
Property boundary line
2
Terminal assembly
3
Top view rear flue
A
300mm minimum*
*Reduction to the boundary is possible down to 25mm but the flue
deflector must be used.
Important
The distance from a fanned draught appliance terminal installed
parallel to a boundary may not be less than 300mm in accordance
with the diagram opposite.
1
Opening window or door
2
Air inlet
3
Plume displacement kit
A
150mm minimum
Important
If fitting a Plume Displacement Flue Kit, the air inlet must be a
minimum of 150mm from any opening windows or doors.
Important
The Plume Displacement flue gas discharge terminal and air inlet
must always terminate in the same pressure zone i.e. on the same
facing wall.
Fig.17
Property boundary
PN-0000457
3
1
2
A*
Fig.18
Plume displacement kit
PN-0000458
3
1
2
A
5 Before installation
30