4.3
Rules for placement
The consumer has to be put up on a firm basement with a
corresponding capacity, preferably on a concrete or other inflammable
plate. If the existing set doesn't comply with this necessary condition,
it is necessary to make sufficient measures to satisfy this requirement.
In case of installation to the floor from a combustible material, it is
necessary to place the consumer on an insulating pad from an
inflammable material, which overlapped the ground plan of the
consumer by 800 mm in the direction of radiation, 400 mm from
remaining sides.
It is not allowed to put subjects from combustible materials on the
consumer and on the distance less than the safety distance (see table
No. 2). In case of unknown stage of combustibility it is necessary to go
from the distance for the stage E (F).
As the minimal distance from combustible materials or materials
sensitive for heat (for example, furniture, wallpapers, wooden facing)
or bearing walls, you may use the following distances, see fig. No. 4
and Tab. no. 2.
Regulation grates of combusting, venting and heating air have to be
placed so that they cannot be impacted.
Tab. №. 2
Grade of reaction to fire
Grade of reaction to
Examples of building materials and products included in the
fire
Granite, sandstone, concrete, bricks, ceramic tiles, mortars, fireproof
A1 – incombustible
plasters,...
acumin, izumin, heraklit, lignos, boards and basalt felt, fibreglass
A2 – hardly combustible
boards,...
Beech and oak wood, hobrex boards, plywood, werzalit, umakart,
B – heavily combustible
sirkolit,...
C (D) – moderately
Pinewood, larch, whitewood, chipboard and cork boards, rubber
combustible
flooring,...
E (F) – lightly
Asphaltboard,
combustible
polystyrene, polyethylene, PVC,...
Safe distance of flue from combustible building constructions
Safe distance from a door frame paneling and similarly situated building constructions made of combustible materials and the installation of
pipelines, including its insulation is min. 20 cm. The distance from other parts of the constructions made of combustible materials is min. 40 cm
according to ČSN 06 1008/1997. These are building materials of flammability class B, C and E according to ČSN EN 13501-1/2010. This is also
valid for walls and, in particular, ceilings with plaster on flammable surfaces such as laths, reed fiber, etc.! If these distances cannot be complied
with, the fire danger must be prevented using building and technical measures, non-combustible siding, insulation and temperature-resistant
screens. See example below.
The distance may be reduced to a quarter, if the flue is sheathed at least with 2 cm thick non-flammable material (temperature-resistant
insulation).
The producer has no responsibility for improperly built chimney or for insufficient spaces between the chimney and combustible constructions
etc. This is in full responsibility of the chimney supplier and the construction company by which the chimney has been built.
The same for the stove manufacturer who has no responsibility for the inconveniently resolved passage of the flue in the flammable wall or in
the ceiling.
Connecting appliances through walls
If the flues lead through the walls made of combustible building materials, or have flammable components, then it is necessary to make filling of
non-combustible materials with very low thermal conductivity (see ČSN 061008 Fire safety of heat installations) around the flues.
Example:
Fig. №. 5
Passage through a combustible wall
reaction of fire (extract from EN 13501-1+A1)
fibreboards,
cellulose
Fig. №. 4
perpendicular to the
materials,
polyurethane,
Fig. №. 6
Passage through a brick wall
53
Minimum distance (mm)
Direction
Other directions
A, B
radiating wall C
-
-
800
400
800
400
800
400
1600
800
GB
GB