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In the case where there are larger sections, it is necessary to insert a steel pipe
(A) inside the masonry one (C), as shown in figure 2.6.
i
The steel flue pipe must be suitable insulated with a high temperature-
resistant rock wool or vermiculite material (B).
Figure 2.6: Example of extraction flue connection.
In the case of fire in the extraction flue or duct, switch off the heater
immediately and disconnect it from the house mains power supply.
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