BOILER LOCATION &
CLEARANCES
This boiler is only suitable for installing internally
within a property at a suitable location onto a
fixed, rigid non-combustible surface at least the
same size as the boiler and capable of support-
ing the boiler weight.
COMPARTMENTS:
Follow the requirements of B S6798 and
BS5440 Part 2 and note:
• Minimum clearances must be maintained
• An access door is required to install, service
and maintain the boiler and any ancilliary
equipment.
• If fitting the boiler into an airing cupboard
use a non-combustible perforated material
(maximum hole sizes of 13mm) to separate
the boiler from the airing space.
BOILER CLEARANCES:
The diagram opposite shows the minimum
space required to install and service the boiler.
If a boiler is installed in a compartment with
clearances less than shown in the diagrams A
and B, ventilation is required. Refer to tables
below for ventilation requirements.
BOILER CLEARANCES - UNVENTILATED
COMPARTMENTS:
The diagrams (A and B) opposite show two
options for the minimum space required to
install and service the boiler inside an unventi-
lated compartment.
*This space can be reduced to 50mm for one
side only as long as both the side clearances
add up to the total of both the side
measurements shown or more.
12 & 24 kW
Vent
To room or
Direct to
position
internal space
outside
High
Minimum free
Minimum
level
area 122 cm
2
free area
61 cm
2
Low
Minimum free
Minimum
level
area 122 cm
2
free area
61cm
2
SERVICING CLEARANCES
VENTED COMPARTMENT
VENTILATION FREE
COMPARTMENTS
INSTALLATION CLEARANCES
Using 100mm flue kit
1080mm
Using 125mm flue kit
- 1110mm
BOILER LOCATION & CLEARANCES
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System
8 716 107 375a (02/05)
13
P
R
E -
IN
ST
AL
LA
TI
O
N
A
B
