Doc No. 700015 Page 12 of 36
Option 2 - Figure 6.b. Forced Burner with Heat Exchanger (No External Flue)
For ducted air and products of combustion to ventilated area
Ventilation requirements are as detailed in
section 1.7
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
Products of
combustion to
ventilated area
Fresh
Air
Products of
combustion
Firing
tube
H
G
M
G
G
J
F
E
E Forced
Burner
F Heat
Exchanger
G 100mm (4ins) Clips x2
H 100mm (4ins) Flexible Flue
J 100mm (4ins) Flexible Flue to Fan
M Shroud for unflued heater installation
