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