Potterton Performa 24 Installation & Servicing Instructions Manual page 16

Maximum Length = 4m inc. 2 x 45° bends
Vertical
Flues
(Twin Pipe)
Maximum Length = 14m
inc. 4 x 45° bends
Vertical
Flues
16
Horizontal
Flues
Maximum Length = 2m
inc. 2 x 90° bends
7.0 Site Requirements
7.12 Flue Options
1. The Potterton Performa 24 can be fitted with
flue systems as illustrated.
2. The standard flue is suitable only for horizontal
applications.
3. Maximum permissible equivalent flue lengths
are:-
Horizontal
Vertical
Vertical (Twin Pipe)
4. Any additional "in line" bends in the flue system
must be taken into consideration.
Their equivalent lengths are:-
Concentric Pipes:
45° bend
90° bend
Twin Flue Pipe
45° bend
90° bend
The elbow supplied with the standard horizontal
flue is not included in any equivalent length
calculations
5. The illustrations opposite show examples of
maximum equivalent lengths.
6. Instructions for guidance and fitting are
included in each kit, where appropriate.
5 metres
4 metres
15 metres
0.5 metres
1.0 metres
0.25 metres
0.50 metres