5 Before installation
Key Description mm Key Description mm
C
(1)
Horizontally to an opening, air brick,
opening window etc.
300 L From an opening in carport (e.g. door,
window) into the dwelling
1200
D
(2)
Below gutters, soil pipes or drain pipes 25 (75) M Vertically from a terminal on the same
wall
1500
E
(2)
Below eaves 25 (200) N Horizontally from a terminal on the
same wall
300
F
(2)
Below balconies or car port roof 25 (200) R From adjacent wall to flue (vertical on
ly)
300
G
(2)
From a vertical drain pipe or soil pipe 25 (150) S From an adjacent opening window
(vertical only)
1000
H
(2)
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 150 mm 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 25 mm clearance is allowed per installation. If one of the dimension D,E,F,G or H is 25 mm 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 displace
ment 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 com
bustion 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
2
3
A
Property boundary line
Terminal assembly
Top view rear flue
300 mm minimum*
*Reduction to the boundary is possible down to 25 mm 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 300 mm in
accordance with the diagram opposite.
Fig.17 Property boundary
3
1
2
A*
30 600 Combi 2
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