The fireplace can be used to connect a multi-occupied chimney, which means that to the chimney with the fireplace connected, we
can connect more devices.
Before connecting the fireplace, make sure there is sufficient blast in the chimney. Flame of a burning paper or candle should be
sucked into the chimney opening. The fireplace should be attached to the chimney flue in the shortest direction.
The fireplace should be attached to the chimney flue always with the consent of competent chimney sweeper office in compliance
with STN 73 4210 and STN 73 4201.
If the fireplace cannot be attached to the chimney flue directly, the flue involved should be the shortest possible and ascend
towards the chimney. Flues can be of maximum 1,5 m length. In any case, it is necessary to ensure smoke tubes and bends,
mounted on exhaust throat, against getting loose by a pin. Smoke tubes and bends must be attached firm and tight to the fireplace
and plugged into each other by minimum 40 mm length in the direction of chimney blast. The chimney opening must be fitted with
a sheet metal case with a diameter corresponding to the diameter of used smoke tubes.
Correct and incorrect connection of fireplace to the chimney is displayed in Figure 1.
Connection to the chimney
Incorrect Correct
Figure 1
Incorrect Correct
To ensure a failure-free operation, the chimney blast must be kept at 12 Pa (measured inside of smoke tube behind the fireplace).
As the chimney blast can be affected by changeable factors, as the outside air temperature, combustion temperature, chimney
lining, wind power, etc., it varies during the year. Therefore it is recommended to install a damper inside of the chimney.
The fireplace can reach the specified performance and efficiency as long as it is connected to a chimney with sufficient blast
draught. The chimney´s cross section must be 150x150 mm, and minimum height 5 meters.
1.4 Space venting
The fireplace operation requires sufficient space venting, meaning incoming flow of outside air into the space where the fireplace is
operated. That can be done through an open window or open external door. However, it is safer, if together with the installation of
fireplace a special opening is made in the external wall, in the area where fireplace is mounted, in order to ensure sufficient
incoming air flow for combustion. Adjustable ventilation grille, opened and closed from inside, should be embedded in the opening.
The fireplace needs for wood combustion up to 20 m
3
of fresh air per hour.
Insufficient air flow runs counter to proper operation of fireplace and is a threat to your safety!
Let the installation of your fireplace, its connection to chimney and venting be tested by a competent chimney sweep in
your area!
1.5 Fire safety
It is obligatory to strictly adhere to the rules of fire safety covered by STN 92 0300.
In case of nearby flammable building material or objects with combustibility degree B, C1 and C2 according to STN 73 0823, place
the fireplace with appropriate flue at safe distance which is at minimum 400 mm from these objects.
Safe distance should be doubled if the fireplace with flue was standing close to material with the combustibility degree C3. The
same applies if the degree of combustibility for the material cannot be proved.
Safe distance can be decreased to half in case of using a nonflammable, heat-insulating shading board, min. 5 mm thick, placed in
such a way there is 25 mm gap left between the board and the protected flammable object.
If the flooring is made of flammable material, place the fireplace on nonflammable, heat-insulating pad with dimensions exceeding
the contour of fireplace by 300 mm in the front and by 100 mm on all other sides. The smallest dimensions of the pad and the
location method are displayed in Figure 2. Shading board placed on the protected object must exceed the contour of fireplace,
including the smoke tubes, by at least 150 mm on each side and at least 300 mm above the upper area.
In case of fire in chimney follow the fire safety rules.
