Vertical

Flues

Y

X

8.0Flue Options

8.2Vertical Flue Systems

1.Maximum permissible equivalent flue lengths are:-

 

(60/100)

(80/125)

Vertical Concentric

10 metres

20 metres

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

1.0 metres

The elbow supplied with the standard horizontal flue kit 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.

Total Equivalent Length =

A+B+C+1x90°Bend

All vertical and angled runs must be included, measured from the boiler adaptor (point X) to the joint with the flue terminal (point Y). One 91.5° bend or two 135° bends can be included without reduction of the flue length.

If further elbows are required the flue length must be reduced by the following amounts:-

 

 

 

 

 

 

 

 

1 metre for each 91.5° bend

 

 

Y

 

 

 

 

0.5 metre for each 135° bend

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Roof Terminal

C

This bend is equivalent to 1 metre

A

X

22© Baxi Heating UK Ltd 2012

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Baxi Potterton Condensing Combination Boiler manual Vertical Flues, Vertical Flue Systems
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Condensing Combination Boiler specifications

The Baxi Potterton Condensing Combination Boiler is a sophisticated heating solution designed to meet the demands of modern households while promoting energy efficiency. This state-of-the-art boiler combines both heating and hot water capabilities into a compact unit, making it an ideal choice for homes with limited space.

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