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www.vallox.com
Vallox Oy | Myllykyläntie 9-11 | 32200 LOIMAA | FINLAND
MANU
AL
Measuring and adjusting the air flows
Standard ventilation
The volume flow rate of the air inside the cooker hood is
measured with the damper closed and, where required,
adjusted based on the static pressure loss and the
performance scheme of the cooker hood.
• Measure the static pressure loss of the cooker hood by
pushing the probe through the hole in the damper (see the
figure).
• Determine the volume flow rate from the performance
scheme based on the measured pressure and the number
of open holes in the damper.
Adjustment:
• Cover the required number of holes in the damper with the
magnetic strip that is delivered with the cooker hood.
Boost ventilation
The volume flow rate of the air inside the cooker hood is
measured with the damper open based on the static pressure
loss and the performance scheme of the cooker hood.
• Measure the static pressure loss of the cooker hood. The
measuring point must be located 2 times the duct diameter
above the outlet collar of the cooker hood (see the figure).
• Determine the volume air flow based on the measured
pressure and the performance scheme (with the damper
open).
NOTE
If a Vallox Smoke Limiter has
been installed in connection to
the Vallox X-Line KTXA cooker
hood, adjustment of the boost
air flow must be completed in
accordance with the manual of
the smoke limiter.
mittauspiste min.
2xkanavan halkaisija
Measuring point min.
2 x duct diameter
Standard ventilation
Boost ventilation
10
20
30
40
50
60
80
100
200
300
400
25 dB (A)
30 dB (A)
35 dB (A)
40 dB (A)
40 dB (A)
35 dB (A)
30 dB (A)
25 dB (A)
2
3
4 5 6 7 8 10
20
30 40 60
80
St
at
ic p
re
ss
ur
e l
os
s P
a
Air volume flow rate, dm3/s
DAMPER CLOSED
DA
M
PE
R O
PE
N
20 h
ole
s o
pe
n
30 h
ole
s o
pe
n
40 h
ole
s o
pe
n
50 h
ole
s o
pe
n
60
ho
les
op
en
70 h
ole
s o
pe
n
80 h
ole
s o
pe
n
