10
d
11
d
12
MAXIMUM FLOW IN
m
/h
3
up to 50
over 50 upt to 100
over 100 up to 150
The opening section must be of suitable
size
YES
The opening is suffi ciently wide to allow a
suitable ventilation for the appliance.
NO
The opening section is insuffi cient
The opening is not suffi cient to supply the
appliance and the fl ue which must have its
own air supply opening (contact the fl ue ma-
nufacturer).
YES
The opening section is insuffi cient
The opening is not suffi cient to supply the
appliance and the fan (to adjust the opening,
see table at the bottom of the page).
AIR INLET SPEED IN
m/s
1
1
1
AIR PASSAGE ADDITIONAL
NET SECTION IN cm
140
280
420
GB
2
87