Combustion Air - Royal DORA AIR Installation And Maintenance Manual

6.4 Combustion air

The appliance, during its operation, requires
combustion air.
The inflow of combustion air can be obtained in
the following ways:
• it can come directly from outside with direct
connection to the combustion chamber.
• it can come from the installation room or suita-
ble adjacent rooms.
Extraction of combustion air from outside
In this case, a possible alternative may be:
• to channel the combustion air using a coaxial
pipe to expel the flue gases and extract the air
(Fig. 14 - Fig. 15 - A, B = Air inlet, C, D = Flue gas
outlet); in this case it is not necessary to create
a classic air intake in the room.
• to connect the combustion air inlet of the ap-
pliance to the air intake using a dedicated pipe
(Fig. 16 - Fig. 17).
DORA
D
68
A A
B
C
Fig. 14
GRAZIA
D
B
C
DORA
A A
Fig. 15
Fig. 16
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