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Bosch Flue and Ventilation Quick Reference Guide 2022
U and 5U (uncorrected chimney height) for boilers in cascade
Boiler Combinations
2 x GC 7000 WP 50kW
3 x GC 7000 WP 50kW
4 x GC 7000 WP 50kW
5 x GC 7000 WP 50kW
6 x GC 7000 WP 50kW
2 x GC 7000 WP 65kW
3 x GC 7000 WP 65kW
4 x GC 7000 WP 65kW
5 x GC 7000 WP 65kW
6 x GC 7000 WP 65kW
1 x GC 7000 WP 85kW
2 x GC 7000 WP 85kW
3 x GC 7000 WP 85kW
4 x GC 7000 WP 85kW
5 x GC 7000 WP 85kW
6 x GC 7000 WP 85kW
1 x GC 7000 WP 100kW
2 x GC 7000 WP 100kW
3 x GC 7000 WP 100kW
4 x GC 7000 WP 100kW
5 x GC 7000 WP 100kW
6 x GC 7000 WP 100kW
1 x GC 7000 WP 125kW
2 x GC 7000 WP 125kW
3 x GC 7000 WP 125kW
4 x GC 7000 WP 125kW
5 x GC 7000 WP 125kW
6 x GC 7000 WP 125kW
1 x GC 7000 WP 145kW
2 x GC 7000 WP 145kW
3 x GC 7000 WP 145kW
4 x GC 7000 WP 145kW
5 x GC 7000 WP 145kW
6 x GC 7000 WP 145kW
CO Detection for cascade flues systems
Bosch has taken the decision to require the mandatory use of CO detection for boiler systems using a cascade flue system where there is
more than one appliance. CO detection must result in a boiler shut off and prevent CO exposure.
With our GC 7000 WP range, all Bosch Cascade base flue kits contain a CO detector for on-site wiring into our CC8313 controller or
MC400 Cascade controller, where these controllers are not used due to controls from a BMS system it is still a requirement that the BMS
has some form of CO detection thus activating a boiler shut off. The detection threshold level should be no higher than 50ppm.
Failure to fit a form of CO detection to a Cascade will result in a failed commissioning.
For more information on CO detection please see technical bulletin: TB 0164 a (07/2022)
Please refer to manufacturer's instructions for more information on flue requirements.
Whilst it is always our intention to fully assist, it is essential to recognise that all information given by the company in response to an enquiry of any nature is provided in good faith and based
upon the information provided with the enquiry. We recommend that advice should always be checked with your installer or contract partner. Consequently, the company cannot be held
responsible for any liability relating to the use or repetition of such information or part thereof. In addition, whilst making every reasonable effort to monitor the performance and quality of
our supply, installation and service network, we do not accept responsibility for the workmanship or operation of any third party company that the company may have promoted either in
conversation, e-mail, or other communication. Similarly, the views and opinions expressed in communication with individuals within the company may not reflect that of the business as a whole.
You can find this, and all issued technical bulletins on the Worcester website at: worcester-bosch.co.uk/tb or worcester-bosch.ie/tb
Worcester, Bosch Group, Cotswold Way, Warndon, Worcester WR4 9SW Technical Services: 0330 123 3366 | technical-advice@uk.bosch.com
kW input
95
142.5
190
237.5
285
128.6
192.9
257.2
321.5
385.8
82
164
246
328
410
492
96.5
193
289.5
386
482.5
579
118.1
236.2
354.3
472.4
590.5
708.6
140.1
280.2
420.3
560.4
700.5
840.6
U (m)
0.370
0.472
0.561
0.642
0.716
0.444
0.566
0.673
0.769
0.858
0.339
0.514
0.655
0.779
0.890
0.993
0.374
0.567
0.723
0.859
0.982
1.095
0.422
0.639
0.816
0.969
1.108
1.236
0.467
0.709
0.904
1.074
1.228
1.370
5U (m)
1.85
2.36
2.81
3.21
3.58
2.22
2.83
3.37
3.85
4.29
1.69
2.57
3.28
3.89
4.45
4.97
1.87
2.84
3.62
4.30
4.91
5.48
2.11
3.20
4.08
4.85
5.54
6.18
2.34
3.54
4.52
5.37
6.14
6.85
15
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