46 ELFOFresh² BT15B012GB-00
Selection diagram
Flow rate measurement qV (m³/h, m
3
/s)
The ow rate qV is calculated by multiplying the eective intake velocity Vk (m/s), measured using a hot-wire anemometer or a pitot tube, by the actual
section Ak (m²) shown in the table at the side.
Ak - values (m²)
Size Ak
AIRJET 50/I 0,0062
AIRJET 80/I 0,00098
qv (m³/s) = vk x Ak
qv (m³/h) = vk x Ak x 3600
Pressure drop
Dp = pressure drop
Q = Air ow
Key
Δp - Pressure drop [Pa]
NR - Sound level [dB]
Ak - actual Section [m²]
Vk - Eective air intake velocity [m/s]
Vt - Terminal velocity [m/s]
Vr - residual velocity in the occupied zone [m/s]
qV - Air ow rate [m³/h, m³/s]
L - Range, launch [m]
Height of the room: 2.7 m
Height of occupied area: 1.8 m
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