Technical data

1716
Flue terminal positioning
boundary
O
P
P
P
P
R
Q
Q
D,E
B
C
A
I
G
H
J
L
F
I
P
H
H
N
M
K
Terminals adjacent to windows or openings on
pitched and flat roofs
600mm
600mm
2000mm
The flue should not penetrate
the shaded area
RSF horizontal and vertical
Minimum dimensions of flue terminal positions for balanced room
sealed flues with fanned draught:
General position
1. The terminal must not cause an obstruction nor the
discharge a nuisance. Particular care should be exercised
with regards to the pluming of the flue gases and any
increase in noise levels.
2. If a terminal is fitted less than 2 metres above a surface
to which people have access, then a guard must be
fitted. A terminal protective guard is available from
Tower Flue Components, Vale Rise, Tonbridge.
Tel: [phone]. The terminal guard must be
securely fixed to the wall using suitable plugs and
corrosion resistant screws. The guard must be
symmetrically positioned about the terminal assembly
and spaced such that there is a gap of 50mm between
the end of the terminal and the guard.
3. In certain weather conditions, a white plume of
condensation will be emitted from the flue terminal and
siting where this could be a nuisance, i.e. near security
lighting, should be avoided.
4. The air inlet/outlet duct and the terminal of the boiler
must not be closer than 25mm to any combustible
material. Detailed recommendations on protection of
combustible materials are given in BS 5440:1.
Terminal position Min. distance
(mm)
A
1
Directly below an opening, air brick, opening windows etc 300
B
1
Above an opening, air brick, opening window etc 300
C
1
Horizontally to an opening, air brick, opening window etc 300
D Below gutters, soil pipes or drain pipes 75
E Below eaves 200
F Below balconies or car port roof (lowest point) 200
G From a vertical drain pipe or soil pipe 150
H From an internal or external corner or to a boundary alongside 300**
the terminal
I Above ground, roof or balcony 300
J From a surface or boundary facing the terminal 600**
K From a terminal facing the terminal 1,200
L
2
From an opening in the car port (e.g. door, window) into 1,200
the dwelling
M Vertically from a terminal on the same wall 1,500
N Horizontally from a terminal on the same wall 300
O From a non-combustible vertical structure on the roof *
P Above intersection with the roof *
Q Adjacent to windows or openings on pitched and flat roofs 600
R Below windows or openings on pitched roofs 2,000
Key to illustration
1 In addition, the terminal should not be nearer than 150mm (fanned draught)
to an opening in the building fabric formed for the purpose of accommodating
a built-in element such as a window frame.
2 Not recommended.
*See instructions supplied with vertical flue kits.
**Care should be taken to ensure terminal siting does not cause a nuisance to
adjacent properties.
The flue system must be installed and terminated in
accordance with the recommendations of BS 5440:Part 1.
Boiler location & clearances
Bathrooms
The boiler can be installed in zones 2 or 3.
If a mechanical or RF mechanical timer or text display with
room thermostat (IP 20 only) is fitted the boiler can only be
installed in zone 3.
A non mechanical timer can be installed in zone 2.
See IEE wiring regulations. (See Technical Data for
IP ratings).
600mm
2,250mm
600mm
750mm
600mm
2,250mm
600mm radius
750mm
3
3
2
2
1
1
1 1
2
3
IMPORTANT: any switch or appliance control using mains
electricity must not be able to be touched by a person
using the bath or shower.
Electrical switches, fused spur and socket outlets must not
be situated in the bathroom.
All pipework to the appliance must be cross bonded.
BBT1253 G_CDi Rg+Sys TS c08_07 25/6/07 09:21 Page 16