Baxi Ecogen 24/1.0 Installation & Servicing Instructions Manual page 22

Horizontal Flues
NOTE: Horizontal flue pipes should always be installed with at least 1.5° fall from
the terminal to allow condensate to run back to the boiler.
Total equivalent length = A+B+C+2x90°Bends
page 24
8.2 Twin & Vertical Flue Systems
1. Maximum permissible equivalent flue lengths are:­
Vertical Concentric (60/100) 5 metres
Vertical Twin Pipe (80/80)
2. 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
Twin Flue Pipe
135° bend 0.25 metres
91.5° bend 0.50 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 X to Y as shown.
IMPORTANT:
10 metres
1.0 metres