Ravelli Flexi 11, Use And Maintenance Manual

Page: 26 / 64

Use and maintenance manual Flexi 11
Pag.26
Rev.1 04/03/2021
This type of installation (See Fig.1) requires an insulated
chimney pot, even if the entire conduit is installed inside
the building. Besides, the structure must be inserted into a
properly ventilated skylight shaft.
In the lower part of the chimney pot there is an inspection
cover, properly isolated from wind and rain.
It is possible to use an existing chimney or a shaft via ducting.
For this type of installation the standards on ducted smoke
evacuation systems must be complied with. In the lower part
of the chimney pot, inside the home, there is a "T" type fitting
installed; externally there is another one installed, so that the
outside section can be inspected.
It is prohibited to install two 90° bend, since the ashes would
quickly obstruct smoke passage, causing draught problems in
the stove. (See Fig. 2)
Ashes deposited in the
90° bend
NO
Installation example for a stove/pellet stove
Smoke duct:
use of a non-insulat-
ed tube
T Fitting
Insulated chimney
Fig.3
Protection from rain
T fitting for condensation
Combustion ashes
collection chamber
+ condensation cap
Protection from rain
Fig.1
Grille for air passage into the
skylight shaft with opening for
inspecting the chimney
Skylight shaft
T fitting for condensation
Insulated chimney
It is prohibited to install a 90° bend for the initial segment,
since the ashes would quickly obstruct smoke passage,
causing draught problems in the stove. (See Fig. 2)