EdilKamin FIREBOX DECO Installation, Use And Maintenance Manual page 14

HOT-AIR CIRCULATION AND DUCTING
(FIG. D)
The air drawn from the outside through the special
mechanism (A) is mixed with air drawn from the room
through the lower grilles (B). The mixed air is then
heated in the rear cavity and comes out into the room
through the upper front grille (C).
This ensures replenishment of the air which leaves
Firebox® through the flue during operation and at the
same time heats the room.
Alternatively, the hot air may reach the room through
an outlet connected to the holes in the upper part of
Firebox® (D) with Ø 14 cm aluminium pipes.
The air circulation described above may take place
naturally by convection or with the help of two fans (E)
housed in the base.
If the hot air is channelled into rooms other than the one
in which Firebox® is installed, it is necessary to ensure
an air return to the installation room through grilles at
the bottom of the walls or gaps under the doors.
The pipe diameter must not be less than 14 cm so
that the air does not exceed a speed of 5 m/s, thus
avoiding irritating noises or excessive load losses
owing to friction.
It is important that the path of the pipes is as straight
as possible.
14 Aluminium pipes may be hidden within the ceiling or
false beams, or built into walls; in any case, they must
be well insulated.
The ducting must be a maximum of 4 - 5 m long for
Firebox® with natural convection and 6 - 7 m long for
Firebox® with forced ventilation.
This length must be reduced by 1.2 m for each bend
and for each outlet owing to load losses.
INSTALLATION
The product is supplied with two anti-corrosion
discs (one on the outside and one on the inside of the
combustion chamber).
They must be removed during unpacking and disposed
of as normal waste.