8
3.0 Site Requirements
3.1
Location
1. The appliance must be fitted on a suitable
outside wall to meet the requirements of the
balanced flue arrangement.
2. For applications involving walls constructed
from or comprising of combustible material,
reference should be made to the requirements of
B.S. 5871 and Building Regulations.
3. Building Regulations will require the flue duct to
be separated from any combustible material
within the wall by a non-combustible sleeve
enclosing an annular air space of at least 25mm
(1 in) around the flue duct.
4. If the outer face of the wall is combustible, a
plate of metal (or other non-combustible material)
should be fitted over the flue duct extending at
least 50mm (2 in) around the terminal.
5. Further guidance on timber frame construction
is given in the Institute of Gas Engineers UP7.
“Guide for Gas Installations in Timber Framed
Dwellings”.
3.2
Clearances
1. The appliance must be fitted on a vertical flat
non-combustible wall. Any combustible wall
coverings should be removed from within the area
of the outer case.
2. Internally the appliance must not be fitted under
a shelf or sill which has a projection of more than
150mm (6 in).
3. Curtains or a shelf must not be closer than
140mm (5
1
/
2
in) (F 5 & F 5S), 89mm (3
1
/
2
in) (F 8S
& F 8ST) from top of outer case.
4. The bottom of the outer case must be a
minimum of 72mm (2
7
/
8
in) from the floor. Subject
to this minimum dimension it is recommended
that the appliance is fitted as close to the floor as
possible for optimum distribution of heat.
5. Minimum side clearance form any wall or fixed
furniture to the outer case is:
Left hand side:
45mm (1
3
/
4
in)
Right hand side: 57mm (2
1
/
4
in)
Installer Guide
IMPORTANT:
LPG Models.
This appliance must not be installed below
ground in basements, cellars, etc. unless
these are open to ground level on one side.
For further guidance see
BS 5871 Pt.1.
