Quick Start Manual

7.0 Site Requirement
21
© Baxi Heating UK Limited 2005
Key Accessory Size Baxi Code
Number
Concentric Flue System 110mm diameter
A Horizontal flue kit 850mm 236921
B Straight extension kit 1000mm 241695
500mm 241694
250mm 241692
C Bend kit 93° 241687
D Bend kit (pair) 45° 241689
E Horizontal flue terminal 243013BAX
Clamp 110mm 243014BAX
Twin Flue System 80mm diameter
F Straight extension kit 1000mm 238690
500mm 238692
250mm 238694
G Bend kit 90° 246139
H Bend kit (pair) 45° 246138
Universal Vertical Flue Kits
J Twin flue adaptor kit 242757
K Vertical flue terminal 242802
L Universal roof tile 25°/50° 243015
M Roof cover plate kit 243131
N Flat roof flashing 243016BAX
R Boiler connection vertical concentric 242886
Clamp 80mm 238684
7.10 Flue options
Concentric
The maximum equivalent lengths are 4m (horizontal) or
5m (vertical). There lengths exclude the standard elbow
and flue/terminal assembly (horizontal) and terminal
assembly (vertical).
Twin Flue
The total maximum equivalent flue length is 40m.
NOTE: Each 1m of flue duct should be calculated as 2m.
Any additional “in line” bends in the flue system must be
taken into consideration. Their equivalent lengths are:
Concentric Pipes: 45º bend 0.5 m
93º bend 1.0 m
Twin Flue Pipe: 45º bend (air duct) 1.3 m
45º bend (flue duct) 2.6 m
90º bend (air duct) 4.8 m
90º bend (flue duct) 9.6 m
Detailed examples of equivalent flue length calculation are
given in the Installation Guidance Notes for each flue
system type.
(Documents 243501 and 243502 for concentric and twin
pipe respectively).
A - Standard Flue
D
C
B
E
K
L
M
D
J
F
J
N
H
G
R
Plume Displacement
70/110 dia Kit