COD. 79101EN.00
11/2013
18
4.7.3 HOLE IN FLUE DUCT PIPE
Once the boiler location is established, it is necessary to make the hole for the flue duct pipe. This varies
depending on the type of installation, diameter of the unloading pipe and type of wall or ceiling that it is going to
pass through.
The insulating barrier must be mineral-based (rock wool, ceramic fiber) with a nominal density greater than 80
kg/m
3
.
Diameter flue duct pipe [mm]
Ø80
Up to 24 kW
Ø 100
From 28 kW
Insulation
thickness [mm]
Diameter holes to be done [mm]
Wall in flammable wood or with
flammable parts
100 280 300
Wall or ceiling in cement
50
180
200
Wall or ceiling in brick
30
140
160
4.7.4 USE OF A TRADITIONAL TYPE CHIMNEY
If you wish to use an existing chimney it is strongly recommended that you have it checked by a professional
chimneysweep to ensure that it is completely airtight. The reason for this is that the smoke, because it is slightly
pressurized, can infiltrate any cracks in the flue and escape into living spaces.
If upon inspection you find that the chimney is not completely sound, it is recommended that you insert piping made
of new material.
If the existing chimney is wide enough, we recommend a pipe with a maximum diameter of 150 mm; it is also
recommended that you insulate the chimney flue. Fig. 1 and 2 represent the solutions to be adopted if you want to
use an existing chimney.
Fig. 1
Fig. 2
Summary of Contents for BIOSELF
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