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21
8.0 Flue Options
© Baxi Heating UK Ltd 2012
8.1
Horizontal Flue Systems
1. The standard flue is suitable only for horizontal termination
applications.
2. Maximum permissible equivalent flue lengths are:-
Horizontal Concentric
10 metres
3. Any additional “in line” bends in the flue system must be
taken into consideration.
Their equivalent lengths are:-
Concentric Pipes:
135° bend
0.5 metres
93° bend
1.0 metres
The elbow supplied with the standard horizontal telescopic
flue kit is not included in any equivalent length calculations
NOTE:
Flue length is measured from point (i) to (ii) as
shown.
IMPORTANT:
All flue systems must be securely supported
at least once every metre. Suitable pipe supports are
available as accessories.
Horizontal
Flues
(ii)
(i)
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.
(ii)
(i)
This bend is equivalent to
1 metre
Total equivalent length =
A+B+C+2x90°Bends
B
A
C
This bend is equivalent to
1 metre
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