External air vent
While running the central heating cooker draws air from the room in which it is installed; It is
essential, therefore, that the air is restored through an external air vent.
An air vent must be made at the back of the equipment (15 cm diameter hole), at a height of
20 cm from the ground, near the central heating cooker intake pipe (see figure A and
Connections technical sheet).
if the rear external air vent does not draw air directly from outside the home, a further hole in an
adjacent room must be made provided it communicates with the outside of the home (minimum
diameter 15 cm).
If an air vent cannot be made on the heating cooker rear wall, keep it at least 5 cm away from the
rear wall and drill a hole (diameter as above) in a perimeter wall of the room where the central
heating cooker is installed.
The hole must be protected externally with a fixed grid. Periodically ensure the grid is not
obstructed by leaves or the like, thereby preventing air passage.
The UNI 10683 standard PROHIBITS the withdrawal of combustion air from garages, fuel
stores, or businesses involving a fire hazard.
Do not connect the external air vent to the central heating cooker through piping. If there are
other heating or suction appliances in the room, air vents must ensure the necessary air
volume required for the proper operation of all devices.
In the room where the central heating cooker is to be installed, only sealed equipment (e.g. C
type gas equipment, according to the UNI 7129 Standard), or equipment that does not cause
depression with respect to the external environment can be kept or be installed.
Extractor fans may cause a malfunction in the central heating cooker when used in the same room
or operational space as the cooker.
Flue and connection to the same flue - Chimney
The flue is a key element for the proper operation of the central heating cooker. The minimum section
of the flue must be the one indicated in the central heating cooker specifications (120 mm). Each
central heating cooker must have its own flue, without other intakes (boilers, fireplaces, stoves,
etc…). The flue size is closely related to its height, to be measured from the central heating cooker
outlet to the chimney base. To ensure draught, the chimney flue outlet surface must be twice as big
as the flue section.
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