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Tenbury insert install manual 1015-3 03/12/2015 09:57 Page 6
Minimum Builders
Opening
For ease of installation the builders
opening may be made slightly larger
than the appliance dimensions, please
see diagram opposite.
The construction of fireplace recess
should be of a suitable non-combustible
material such as brick or concrete
blockwork, and have a minimum
thickness of 200mm to the sides and
rear of the appliance, unless it is a back
to back recess within the same property.
Please refer to building regs document J
for more information.
Clearances to
combustible materials
Installation into a false
chimney breast
All parts of the false studwork chimney
must be constructed of a non-
combustible material i.e. metal
studwork.
Do not use combustible materials within
the chequered area (150mm to the sides
of the appliance and 300mm to the rear
of the appliance).
Do not fill the area surrounding the
appliance with insulating material, the
void around the appliance must be
ventilated to prevent a buildup of excess
heat.
There must be minimum ventilating area
at both high and low levels of 50 cm²
each, the vents should take ambient air
from the room in which the appliance is
150mm
installed and return the warm air back
into the same room environment.
Consideration should also be taken to
provide adequate access to the
connecting flue for service and
maintenance purposes.
384mm
560mm
420mm
150mm
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