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• Old chimney flue with an inserted pipe of minimum Ø160 mm and with an external door which enables the
chimney cleaning.
EN
• External chimney flue entirely made up of insulated stainless steel pipes, i.e. with double wall of minimum Ø150
mm: all must be firmly attached to the wall. For chimney against wind effects please (see Fig. 4 page 8).
• Ducting system through T-unions which enables an easy cleaning without disassembling the pipes.
9
FUEL
9.1
FUEL
• The allowed fuel is firewood and its derivatives (lignite blocks, compressed sawdust, etc.) with a maximum
water content of 20%.
• To obtain good firewood, it must be seasoned outside for at least 2 years in a place protected from the
weather.
• Using humid wood or waste bark could create condension and creosote into the ductions and in the hearth.
A heat yield of humid wood is great lower than dry wood.
12
LEGEND
1
2
3
4
We recommend to check with your chimney flue manufacturer the safety distances which
must be respected and the type of insulating material. The aforesaid regulations are valid
also for holes made on the wall (EN 13501 - EN 13063 - EN 1856 - EN 1806 - EN 15827).
Fig. 10 - Example 3
Fig. 10 page 12
Insulating material
Inspection plug
Minimum safety distance = 0,5 mt
Damper
DEMETRA
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