Flue Options - Baxi Combi 105 HE Installation & Servicing Instructions Manual

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 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 2007
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 Baxi Combi 105 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.
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