Flue Options - Baxi Megaflo System 15 HE Installation And Servicing Instructions

Plume Displacement 60 /100 dia Kit
1M Extensions 45° & 93° elbows
are also available - see Section 9.0
Plume Displacement.
NOTE: Horizontal flue pipes should always be installed with a 1.5° to 3° 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 =
A+B+C+2x90°Bends

8.0 Flue Options

8.1
1. The standard flue is suitable only for horizontal
termination applications.
Y
2. All fittings should be fully engaged. The approximate
engagement is 40mm. Apply soap solution to the seal on
X
each fitting to aid assembly.
3. Maximum permissible equivalent flue lengths are:-
Horizontal Concentric (15/18 models)
Horizontal Concentric (24/28/32 models) 10 metres
Horizontal Concentric (all)
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 telescopic
flue kit is not included in any equivalent length calculations
NOTE: Flue length is measured from point X to Y as
shown.
Y
Horizontal Flue Systems
135° bend 0.5 metres
93° bend 1.0 metres
135° bend 0.25 metres
91.5° bend 0.50 metres
(60/100)
15 metres
(60/100)
(80/125)
20 metres