Doc No. 700025 Page 15 of 32
Figure 6. Option 1. Flue Attachment U Tube Burners
Figure 7. Flue/Terminal Attachment Linear Burners
Ventilation requirements are as detailed
in section 1.9
Ducted air must be used on VTC
models, and 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 run = 9.5m @ Ø125mm
Maximum no of bends = 2
All flues must
terminate
vertically.
For further information on flue runs, please refer
to section 1.10.1 and BS 5440 pt.1
A 127mm (5ins) Twin Wall Flue System
B Tube to Flue Adaptor 75mm 201881
C Flue Bend 7166
D Two Stage Burner
E Standard end terminal (unflued)201866-SUB
Products of
Combustion
D
B
C
A
E
Flued Installation
For unflued installation, fit
standard terminal supplied
using grub screw provided
Firing tube
Flange fitted on
VTC models only.
Flexible hose for
ducted air should
be fitted here to
prevent water
ingress
