Insulating layers (protection of standard walls)
- The forewall (22) and the wall of the building (20) must be protected by an insulating layer (4, 16)
with a minimum thickness of 9 cm.
- The surrounding (11) does not need to be protected by the insulating layer if the construction is
protected so that the surface of the surroundings heats to a maximum of 85°C. For natural stone
or ceramic surfaces where no items will be placed, the surface temperature may increase to
a maximum of 120 °C (applies to large slopes or vertical areas of the surroundings - heated tiled
walls, etc.).
Protection of the floor
- Floors from flammable materials must be protected by the concrete plate (7) with a minimum
thickness of 6 cm, which must have an insulating layer (9).
- load-bearing floors and floors from reinforced concrete must be protected by an insulating
layer (9).
surroundings
- The walls of the surroundings distribute the heat into the room and must be from non-flammable
class A1 materials.
- natural stone or ceramic vertical areas in the room can reach a maximum temperature of 120°C.
- Horizontal areas where items may be placed can reach a maximum temperature of 85 °C.
- The surroundings must not be connected to the fireplace insert and must be self-bearing.
- Between the fireplace insert and the surroundings, as well as the bearing frame and the
surroundings, sealing tape or insulating paper must be inserted to covers the difference in the
heat expansion of the material.
ventilation grids
- For the output ventilation grid, a minimum distance of 50 cm from the ceiling must be maintained
and 30 cm from walls from flammable materials, load-bearing concrete walls and
built-in furniture.
- output ventilation grids must be positioned proportionally from the upper part of the
surroundings so that there is no accumulation of heat in the surroundings. during the positioning
of the grids, be aware of any potential problems with cleaning the grids.
- The value of the free cross-section of the grids depends on the material in the surroundings and
the type of the fireplace insert (see technological sheets).
- Ventilation grids must be positioned so they cannot be blocked.
Insulation of the ceiling
- If the surroundings include the ceiling, this must be protected by the respective insulation
according to local installation standards.
floor in front of the fireplace insert
- The floor in front of the fireplace insert must be from non-flammable materials or protected by a
sufficiently thick non-flammable board (e.g. foundation glass).
- non-flammable area:
- In the forward direction, it depends on the height of the bottom of the combustion chamber
from the floor, it is necessary to add to this height 30 cm; the minimum value is 50 cm.
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