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4.9.2
Room sealed flue options
L = 120 - 240mm
L
A
L = 6000mm
A
6 x
B
125mm Ø
L = 6000mm
L
A
C
5 x
B
125mm Ø
L = 6000mm
A
D D
5 x
B
125mm Ø
L = 5000mm
A
C
5 x
B
125mm Ø
Fig. 27 Room sealed flue options
[A]
Flue terminal
[B]
Flue extension
[C]
90° bend
[D]
45° bend
[E]
Vertical flue terminal
Greenstar Danesmoor Utility
2022+
and Utility System
L
L = 6000mm
A
C
C
5 x
B
125mm Ø
L
L = 8000mm
L
C
E
8 x
B
125mm Ø
L = 8000mm
C
L
D
E
D
7 x
B
125mm Ø
L
L = 8000mm
C
L
E
7 x
B
125mm Ø
L
6720808218-93.3Wo
2022+
- 6 721 846 263 (2022/01)
Figure 27 shows the components used and the maximum flue length (L)
for each flue configuration.
In all cases L is measured from the outside of the boiler casing.
• To achieve the maximum flue length (L), a flue section will have to be
reduced in length.
• Only the flue terminal or straight flue extensions can be reduced in
length by cutting.
• The flue terminal end can be fitted from the inside or outside of the
building.
All horizontal sections must rise away from the boiler by
52mm per metre (3°) to allow the condensate to drain
back to the boiler.
Calculating the flue length
Measure the total flue length required, noting that the maximum straight
flue length including the terminal is:
Horizontal 80/125mm Ø: 6000mm (excluding 120mm of terminal
extending outside the building)
Vertical 80/125mm Ø: 8000mm (measured from the boiler top panel).
Then reduce the total straight flue length for each extra flue bend
(excluding the vertical flue kit 90° elbow) by:
• 1000mm for 90°
• 500mm for 45°
Flue extension lengths
Horizontal & Vertical 80/125mm Ø: 1000mm overall length.
Effective length when engaged into sockets within the flue run is
950mm.
Flue terminal lengths
Horizontal 80/125mm Ø: 720mm
Vertical 80/125mm Ø: 1080mm + cage
* to outside wall.
Pre-Installation
23
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