7
Ortal Technical Guide December 2015
Ventilation
This appliance can be installed in a completely sealed or mechanically
ventilated
house without extra ventilation and/or fume
extraction.
General Balanced Flue
Notes
There are many possibilities for installing this Concentric Balanced Flue
system
into a building, both Roof and Wall terminations are possible, and the flue
can
either be built into an existing chimney or a completely new flue system may
be
constructed.
The system is based upon a Concentric Flue system which utilises an inner flue
which passes through an outer flue, for flue size see ‘Flue Design Options’ . The
flue
gasses that are the products of combustion of the fire, pass through the inner flue
and are safely vented to the outside environment. The gap between the inner
and
outer flues is the channel by which the stove is supplied with air for
combustion.
These concentric flues terminate outside of the property in a terminal, this
terminal
will keep the expelled gasses and the fresh air for combustion separate. It
is
important that the terminal is not blocked, a suitable guard maybe required if
the
terminal is located at a "Low" level (usually when the terminal is within 2m of
floor
level).
The Balanced Flue gas appliance can be installed as an insertion into an
existing
or new fireplace. If an existing Flue or Chimney is to be utilised, then the
installation
engineer must be consulted. If the chimney has been previously used it must
be
professionally cleaned and certified as being sound and fit for
use.
The European CE approval on this appliance is restricted to the Flue systems as
specified by the supplier, thus the appliance must only be installed with the
original
flue system, no others may be
used
The gas fire, in combination with the concentric flue system, has been approved
in
accordance with the European CE-norm for gas appliances and may
therefore
be used only with this system. The guarantee is invalidated if the appliance
is
(completely or partially) installed using a different
system.
The concentric flue systems can be used with either a newly-built or
existing
chimney.
These appliances are designed with the "Firebox" raised up off the ground level
by
the built in "Base unit".
Thus these appliances require no special Hearth arrangements, as the floor will not
get hot and is protected by the steel construction of the "Base unit".
The appliance must not be fitted against a rear wall constructed from a
combustible
material; a gap of 300mm should be given all round the stove before
combustible
materials may be used in the wall construction.
If the appliance has to be located in an opening, a minimum clearance of
50mm
should be allowed to non-combustible
materials.