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Doc No. 700015 Page 11 of 36
Option 1 - Figure 6.a. Forced Burner with Heat Exchanger (Standard Flue)
For flued products of combustion and no ducted air
Ventilation requirements are as detailed in
section 1.7
E Forced
Burner
F Heat
Exchanger
G 100mm (4ins) Clips x2
H 100mm (4ins) Flexible Flue
J 100mm (4ins) Flexible Flue to Fan
K 127mm (5ins) to 100mm (4ins) Reducer
L 127mm (5ins) Twin Wall Flue Pipe
Ducted air must be used in locations
where there is airborne dust or where
there is a polluted atmosphere e.g. Chlorinated
Vapours.
Maximum length = 9m
Minimum diameter = 100mm
Maximum no of bends = 2
Maximum flue length = 9.5m @ Ø125mm
Maximum no of bends = 2
All flues must
terminate
vertically.
For further information on flue runs, please refer
to section 1.9.1 BS 5440 pt.1
Products of combustion
Air
Inlet
F
H
G
K
L
G
G
E
J
Products of combustion
Firing
tube