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Bosch Flue and Ventilation Quick Reference Guide 2022
Air supply and ventilation within a commercial installation continued – quick referencing guide to meet IGEM-
UP-10 (Edition 4) and BS6644:2011.
Mechanical ventilation for appliances without draught diverters (that includes or does not include draught stabilisers) in accordance with
IGEM/UP/10 edition 4 table 2
SYSTEM TYPE / GRILLE LOCATION
(WITH 600MM CLEARANCE FROM ANY OBSTRUCTION)
Difference between inlet and extract air
Inlet ventilation
Example: Based on 4 x GC 7000 WP 100kW boilers @ 96.5 kW Net heat input, placed within a boiler room that has a summer
usage below 50%
Inlet ventilation = 2.6 m 3 h
Difference between inlet and extract air = 1.35 m 3 h
Actual extract volume = 1003.6 m 3 h
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
CALCULATION
m 3 h
-1
x (Net heat input kW)
m 3 h
x (Net heat input kW)
-1
x 386 (Total net heat input kW) = 1003.6 m 3 h
-1
-1
- 521.1 m 3 h
= 584 m 3 h
-1
-1
HEATING & / OR HWS
HEATING & / OR HWS
50% SUMMER USAGE
75% SUMMER USAGE
1.35 +/- 0.18
1.35 +/- 0.18
2.6
3.32
-1
x 386 (Total net heat input kW) = 521.1 m 3 h
-1
HEATING & / OR HWS
100% SUMMER USAGE
1.35 +/- 0.18
3.95
-1
5
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