3004355-2012-07-23.fm
GB - BESB – Product information
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The box ventilators, apart from model BESB250, have measuring points for determining
air flow. A manometer is connected to the test points and the air flow (qv) can be
calculated by using the formula and diagrams.
Margin of error < ± 8% of actual air flow with the duct system on the suction side is as
shown on the diagrams.
Calculations are based on the following conditions:
Temperature: 20°C
Density: 1.2 kg/m3
Pressure measurement,
Δ
pm [Pa], at 20°C
1 m3/s = 1000 l/s = 3600 m3/h
1.6 Airflow measurement
BESB315:
BESB400:
BESB500:
q
v
62
Δ
p
m
×
l s
⁄
[
]
=
q
v
85
Δ
p
m
×
l s
⁄
[
]
=
q
v
91
Δ
p
m
×
l s
⁄
[
]
=
Содержание BESB 250
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