Bosch Flue and Ventilation Quick Reference Guide 2022
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You can find this, and all issued technical bulletins on the Worcester website at:
1
Worcester, Bosch Group, Cotswold Way, Warndon, Worcester WR4 9SW Technical Services: 0330 123 3366 | [email protected]
Air supply and ventilation quick referencing guide for the Worcester Bosch GC 7000
WP – covering
BS5440-2:2009
,
BS6644:2011
and
IGEM-UP-10 (Edition 4)
.
Ventilation
Air supply and ventilation within a
domestic installation
– quick referencing guide to meet
BS5440-2:2009
(supply only to single boilers).
With reference to any boiler below 70 kW Input (GC 7000 WP 50 kW & 65 kW condensing boilers only).
Please note:
Groups of boilers exceeding 70 kW net are covered by IGEM-UP-10 (Edition 4) and BS6644:2011.
Total rated net input must not exceed 70 kW
Natural ventilation for open flued appliances installed within a room.
BOILER TYPE
NET HEAT INPUT
VENTILATION ROUTE
ROOM 1
ROOM 2
ROOM 3
GC 7000 WP 50 kW
47.5 kW
Ventilation for room containing
appliance
203 cm²
N/A
N/A
Ventilation through 1 additional
room
304 cm²
203 cm²
N/A
Ventilation through 2 additional
rooms
304 cm²
304 cm²
203 cm²
GC 7000 WP 65 kW
64.3 kW
Ventilation for room containing
appliance
287 cm²
N/A
N/A
Ventilation through 1 additional
room
430 cm²
287 cm²
N/A
Ventilation through 2 additional
rooms
430 cm²
430 cm²
287 cm²
Natural ventilation for open flued appliances installed within an enclosure.
VENTILATION ROUTE / GRILLE LOCATION
VENTILATION TO A ROOM OR INTERNAL SPACE
(THE ROOM OR INTERNAL SPACE VENTILATION MUST BE
VENTILATED AS DETAILED ABOVE TO THE OUTSIDE AIR)
VENTILATION DIRECT TO OUTSIDE AIR
High level (free area cm² per kW net heat input)
cm²
10
5
Low level (free area cm² per kW net heat input)
cm²
20
10
Natural ventilation for room sealed appliances installed within an enclosure.
VENTILATION ROUTE / GRILLE LOCATION
VENTILATION TO A ROOM OR INTERNAL SPACE
VENTILATION DIRECT TO OUTSIDE AIR
High level (free area cm² per kW net heat input)
cm²
10
5
Low level (free area cm² per kW net heat input)
cm²
10
5
This example shows an installation
where the GC 7000 WP 50 kW boiler
is placed within a room adjacent to
two additional rooms.
The two adjacent rooms will have the
larger ventilation installed.
A) & B) Represents high-level and
low-level vent arrangement for an
open flue within a compartment. See
tables below for vent sizing based on
net heat input.
e.g.,
47.5 kW x 10cm² = 475cm²
High level ventilation to a room or
internal space.
