Bosch Flue and Ventilation Quick Reference Guide 2022
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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
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You can find this, and all issued technical bulletins on the Worcester website at:
2
Worcester, Bosch Group, Cotswold Way, Warndon, Worcester WR4 9SW Technical Services: 0330 123 3366 | [email protected]
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.
Open flued gas appliance installed within a plant room
SYSTEM TYPE / GRILLE LOCATION
(WITH 600MM CLEARANCE FROM ANY OBSTRUCTION)
HEATING & / OR HWS 50%
SUMMER USAGE
HEATING & / OR HWS 75%
SUMMER USAGE
HEATING & / OR HWS
100% SUMMER USAGE
High level (free area cm² per kW net heat input)
cm²
2
3
4
Low level (free area cm² per kW net heat input)
cm²
4
5
6
Open flued gas appliance installed within an enclosure (natural ventilation direct to outside air)
SYSTEM TYPE / GRILLE LOCATION
(WITH 600MM CLEARANCE FROM ANY OBSTRUCTION)
HEATING & / OR HWS 50%
SUMMER USAGE
HEATING & / OR HWS 75%
SUMMER USAGE
HEATING & / OR HWS
100% SUMMER USAGE
High level (free area cm² per kW net heat input)
cm²
5
6
7
Low level (free area cm² per kW net heat input)
cm²
10
11
12
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
2
kW
-1
ventilation at high
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)
HEATING & / OR HWS 50%
SUMMER USAGE
HEATING & / OR HWS 75%
SUMMER USAGE
HEATING & / OR HWS
100% SUMMER USAGE
High level (free area cm² per kW net heat input)
cm²
5
6
7
Low level (free area cm² per kW net heat input)
cm²
5
6
7
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.
ASSUMING AMBIENT AIR TEMPERATURE @ 15ºC
High-level (100mm below ceiling level)
ºC
40
Mid-level (Mid-height from floor level)
ºC
32
Low-level (100mm above floor level)
ºC
25
