1918
Flue terminal positioning
600mm minimum
clearance from
a skylight to a
vertical flue
500mm
Vertical flue clearance 500mm
to non-combustible building
material, and 1,500mm
clearanceto combustible
building material
Flue clearances 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.
NOTE: All measurements are the minimum
clearances required. Terminals must
be positioned so to avoid combustion
products entering the building
1,200mm from an opening on the
same wall (ie: door or window
leading into a dwelling) in a carport
with both sides open, to prevent the
build up of combustion products.
Clearance no less than
200mm from the lowest point
of the balcony or overhang
The flue cannot be
lower than 1,000mm
from the top of a light
well due to the build
up of combustion
products
300mm to an
internal or
external corner
1,500mm between a vertical
flue terminal and a window
or dormer window
400mm from a pitched roof
or in regions with heavy
snow fall 500mm
2,000mm below a Velux window,
600mm above or to either side
of the Velux window
600mm distance to a boundary,
unless it will cause a nuisance.
BS 5440: Part 1 recommends
that care is taken when siting
terminals in relation to
boundaries
200mm below eaves and
75mm below gutters,
pipes and drains
200mm
25mm
300mm
1,500mm
300mm
Window
DRAINPIPE
300mm above,
below and either
side of an opening
door, air vent or
opening window
1,200mm between terminals
facing each other
1,200mm
1,500mm
400mm
DORMER
WINDOW
VELUX WINDOW
500mm
600mm
600mm
500mm
Boundary
300mm
1,000mm
1,000mm
52mm fall 104mm fall
500mm
300mm
300mm
300mm
Plume management kits are available for
100mm horizontally terminated flues.
Please refer to the installation instructions
supplied with the plume management kits.
If plume redirection is utilised, the
clearance from any opening must
be increased in the direction of
the plume to 1,500mm.
NOTES:
Plume deflector
Min.
1,500 mm
Opening
in building
Direction of
flue discharge
NOTE:
Installations in carports
are not recommended
500mm clearance to
any vertical structure
on a roof, 600mm to
another flue or 1,500mm
to an open flue.
The flue turret has a built-in angle of 3° to ensure that the condensate flows
back to the boiler for safe disposal via the condensate waste pipe.
All horizontal flue sections must
rise by 3° or at least 52mm for
each metre away from the boiler
to ensure condensate flows back
into the boiler.
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. 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 to allow a gap of 50mm between the end
of the terminal and the condense compatible 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.
The flue system must be installed and terminated in
accordance with the recommendations of BS 5440:Part 1.
(28 Seiten)
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