„Installation and operation manual for fireplace insert”
KFDECOENG1.1562012
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Figure 16. Expansion gaps between the fireplace insert and the enclosure (dimensions in mm).
1.7 Connection of hot air distribution pipes in the hood
If distribution of hot air from the fireplace to other rooms through natural gravitational draught
is designed (maximum 3 m horizontally), connect distribution pipes directly to openings
previously cut out in the separating shelf. Ensure thorough sealing of connections (figure 17).
However, if air is to be distributed by a turbine because of significant distances (forced
circulation), termination of the pipe sucking hot air from the hood ought to be located app. 15
cm below the bottom edge of outlet grates in the hood, to prevent possible suction of cold air
through outlet grates (figure 18). The installation constructed as above should be safe and
the temperature of air coming out from grates in the hood, during fireplace operation at rated
power, should not exceed 90°C.
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