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Plume Displacement Kit 60 /100 Ø
1M Extensions, 45° & 93° elbows
are also available - see Section 9.0
NOTE: Horizontal flue pipes should always be installed with at least a 1.5° fall
from the terminal to allow condensate to run back to the boiler.
This bend is equivalent to
1 metre
A
18
© Baxi Heating UK Ltd 2009
Horizontal
Flues
C
B
This bend is equivalent to
1 metre
X
Total equivalent length (upto 3m) =
A+B+C+2x90°Bends
8.0 Flue Options
8.1
Horizontal Flue Systems
1. The Main Combi 30 HE can be fitted with either
horizontal, vertical or twin flue systems as illustrated.
2. The standard flue is suitable only for horizontal
Y
applications.
X
3. Maximum permissible equivalent flue lengths are:-
Horizontal Concentric
Vertical Concentric
Vertical Twin Pipe
4. Any additional "in line" bends in the flue system must
be taken into consideration. Their equivalent lengths
are:-
Concentric Pipes:
Twin Flue Pipe
The elbow supplied with the standard horizontal flue is
not included in any equivalent length calculations.
NOTE: Flue length is measured from point X to Y
as shown.
IMPORTANT: All flue systems must be securely
supported at least once every metre. Suitable pipe
supports are available as accessories.
Y
3m
3m
12m
135° bend
0.5 metres
93° bend
1.0 metres
135° bend
0.25 metres
91.5° bend
0.50 metres
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