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________________________________________________________________________________________________________________________________
Firma: BeF Home, s.r.o. Strana 2 (celkem 9) Platí od: 1. 4. 2014
Vydání: 4
Information about the combustibility level of some construction materials:
The combustibility level of the construction material
A incombustible granite, sandstone, concrete, special pargeting, bricks, ceramics facing
B hardly combustible - gypsum plasterboard
C1 hard combustible leafy wood, plywood, hardened paper
C2 medium combustible cork sheets, indie-rubber, floor material
C3 light combustible wood-fibre sheets, polystyrene, polyurethane, PVC
Position:
Fireplace inserts can be positioned only in rooms and in places which are risk free. There must not be any electric wires in walls and in
ceilings where a jacketed chimney insert is installed. In rooms where a fireplace insert is situated there must be sufficient fresh-air inlet for
combustion if the fireplace insert isn’t connected to external air input. The base where the fireplace insert is situated must be made and must be
large enough to allow the firebox work correctly.
Fireplace inserts must not be located:
on stairways (excerpt houses where a maximum of two flats are situated)
on corridors open to the public
in rooms, where easily combustible or explosive materials or mixtures are stored or manufactured
in flats or areas which are aired only by means of ventilators or hot-air heaters when a safe function of an open fire is not ensured
with the help of the recommended stand and tube
Heating output:
Bear in mind the information written on the insert design description. The heating potential of the fire depends on the output stated. Output is
applicable to rooms which correspond to the Heat Safety Protection. In rooms which are more than 200 cubic metres it is necessary to count
the heat consumption.
Fireplace insert location and combustion air inflow:
The area must be provided with at least one door which leads into an open space, or with a window which can be open, or it must be
connected with other rooms. Only rooms of the same flat or dwelling are counted. If there is not enough the room where the
fireplace insert is located, must be provided with a tube: which leads directly into the fireplace insert (see pict. 3) and supplies
minimum volume of convectional air. When the fireplace insert is connected with outer air it must be installed on the original stand
which is supplied by manufacturer. - it is necessary to take deformation resistance into account during tubing batching, especially
during curve, branch pipe or long pipe installation.
for combustion air which leads into an open space and supplies at least 360/hour of combustion air 1 m² of firebox hole (see pict.
02). This tube must be connected directly with the fireplace insert. If other fireboxes are located in a heating interconnection at least
540 m3 of combustion air 1 must be supplied into the firebox. To other fireboxes except this at least 1.6 of combustion air /
hour and on each kW of total nominal heat output when the initial pressure difference was at least 4 Pa as compared to an open space
are needed (except fireboxes which are located in areas that do not depend on air in a room, do not need a smoke flue or are located
in areas where the operating safety of inserts cannot be endangered).
if the fireplace insert isn’t connected to external air input, it is recommended that combusting air is supplied towards a fireplace in a
convection area. - it is necessary to arrange tubing for combusting air in buildings with more than two floors, as stipulated by local
building regulations, and tubings for combusting air which connect antifire walls, so that fire and smoke cannot spread into other
floors or fire compartments.
It is possible to use data from the Equipment Certificate when setting the dimension of combusting air flow piping
(inflow of air/hour)
Ask your chimney sweep or fireplace builder for assistance.
2


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