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Bosch Flue and Ventilation Quick Reference Guide 2022
Air Supply and ventilation within a commercial installation – quick referencing guide to meet
IGEM-UP-10 (Edition 4) and BS6644:2011.
IGEM-UP-10 (Edition 4) and BS6644:2011 refers to the installation of an individual boiler or group of boilers that has a total 'net
heat input' exceeding 70kW input.
Please note: Summer usage as per IGEM-UP-10 (Edition 4) states the temperature within a plant room, enclosure, or balanced
compartment must comply with the figures in the table below when assuming an ambient air temperature of 15ºC.
ASSUMING AMBIENT AIR TEMPERATURE @ 15ºC
High-level (100mm below ceiling level)
Mid-level (Mid-height from floor level)
Low-level (100mm above floor level)
Open flued gas appliance installed within a plant room
SYSTEM TYPE / GRILLE LOCATION
(WITH 600MM CLEARANCE FROM ANY OBSTRUCTION)
High level (free area cm² per kW net heat input)
Low level (free area cm² per kW net heat input)
Open flued gas appliance installed within an enclosure (natural ventilation direct to outside air)
SYSTEM TYPE / GRILLE LOCATION
(WITH 600MM CLEARANCE FROM ANY OBSTRUCTION)
High level (free area cm² per kW net heat input)
Low level (free area cm² per kW net heat input)
Room sealed appliance within a plant room
Room sealed appliances in a ventilated space with a Maximum Operating Pressure (MOP) not exceeding 100 mbar must have an air
change rate that exceeds 0.5 ACH (Air change rate per hour), if the air change rate is below 0.5 ACH then 2 cm
and low level should be provided.
Room sealed gas appliance installed within an enclosure (natural ventilation direct to outside air)
SYSTEM TYPE / GRILLE LOCATION
(WITH 600MM CLEARANCE FROM ANY OBSTRUCTION)
High level (free area cm² per kW net heat input)
Low level (free area cm² per kW net heat input)
In addition to the ventilation requirements above, the requirements of DSEAR (IGEM-UP-16, Section 4.9) must be considered when
there is a risk of flammable gas building up from confined gas pipework.
Note: this quick reference document is not intended to replace the need to have access to the relevant standards and only
relates to GC 7000 WP product range.
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
ºC
40
ºC
32
ºC
25
HEATING & / OR HWS 50%
SUMMER USAGE
cm²
2
cm²
4
HEATING & / OR HWS 50%
SUMMER USAGE
cm²
5
cm²
10
HEATING & / OR HWS 50%
SUMMER USAGE
cm²
5
cm²
5
HEATING & / OR HWS 75%
HEATING & / OR HWS
SUMMER USAGE
100% SUMMER USAGE
3
4
5
6
HEATING & / OR HWS 75%
HEATING & / OR HWS
SUMMER USAGE
100% SUMMER USAGE
6
7
11
12
2
kW
HEATING & / OR HWS 75%
HEATING & / OR HWS
SUMMER USAGE
100% SUMMER USAGE
6
7
6
7
-1
ventilation at high
2
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