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4.4
Flue systems considerations
WARNING
Flue systems
Possible flue gas escape
▶ Use Worcester, Bosch Group approved Condensfit II flue systems
only, no other manufacturer's flue have been tested or approved for
use with Worcester, Bosch Group appliances.
CAUTION
Concealed flue systems:
▶ Where a flue system is going to be concealed, provision must be
made for service and inspection.
▶ Voids containing concealed flues must have at least one inspection
hatch no less than 300mm square.
▶ Flue joints within the void must not be more than 1.5 metres from the
edge of the inspection hatch.
▶ Inspection hatches should be located at changes of direction.
▶ If this is not possible, bends should be viewable from both directions.
Refer to the manual supplied with the Worcester, Bosch Group flue kit for
complete installation instructions.
Flue kit part numbers
Part number
Flue Ø
Description
7 733 601 245 60/100 4000 Simple Switch flue adaptor 60/100
7 716 191 082 60/100 Telescopic horizontal flue kit
7 716 191 171 60/100 Extended telescopic horizontal flue kit
7 733 600 048 60/100 Horizontal high level telescopic flue kit
7 719 003 702 80/125 Telescopic horizontal flue kit
7 719 002 430 60/100 Vertical balanced flue kit
7 719 002 431 80/125 Vertical balanced flue kit
7 733 600 298 60/100 1050 mm horizontal fixed flue kit
Table 11 Flue kit assembly part numbers
4.4.1
Flue length
Horizontal maximum flue lengths
Appliance
GR1000W 24 C
GR1000W 30 C
Table 12 Maximum flue lengths - Horizontal flues
Vertical maximum flue lengths
Appliance
GR1000W 24 C
GR1000W 30 C
Table 13 Maximum flue lengths - Vertical flues
Greenstar 1000 – 6721835943 (2023/08)
Flue length [L]
60/100
80/125
9000mm
12000mm
9000mm
12000mm
Flue length [L]
60/100
80/125
9000mm
12000mm
9000mm
12000mm
Flue system bends
NOTICE
Effective flue lengths of bends:
Each bend used has an equivalent straight flue length.
▶ Refer to table 14.
Effective flue length
Bend
60/100
45°
0.5m
90°
1.5m
Table 14 Effective length of bends
SimpleSwitch flue adaptor flue lengths
NOTICE
Effective flue lengths of SimpleSwitch flue adaptor:
The SimpleSwitch flue adaptor has an equivalent straight flue length.
▶ Refer to table 15.
Effective flue length
60/100
4m
Table 15 Effective length of SimpleSwitch flue adaptor
4.4.2
Flue options
The systems have different maximum flue lengths, refer to the following
example flue options for those maximum flue lengths.
Horizontal high level flue assembly
Fig. 14 Horizontal flue option
• Flue length [L] (initial bend included in length calculation)
– 60/100 = 383- 603mm
– 80/125 = N/A
Telescopic horizontal flue assembly
Fig. 15 Horizontal flue option telescopic
Pre-Installation
80/125
0.5m
1.5m
80/125
N/A
60/100 mm
383 mm - 603 mm
130 mm Min
0010042995-001
60/100 mm
[A] 350 mm - 570 mm
[B] 570 mm - 790 mm
130 mm Min
0010042996-001
17
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