S4 R
Supply air side (with F7 filter)
Sound data is given at sound power level LwA in the capacity
diagrams and is corrected with the table below for the various
octave bands. Radiated noise produces Lw in the various octave
bands and total LwA. Radiated noise is estimated by finding the
noise level from the supply air table and deduct the total value
found in the correction factor table below.
Correction factor for Lw
Hz 63 125 250 500 1000 2000 4000 8000 LwA
Supply air 7 3 -1 -3 -6 -7 -17 -30
Extract air 8 9 5 -2 -11 -21 -29 -48
Radiated -43 -31 -33 -34 -38 -38 -39 -44 -30,6
Power consumption in Watt
Contact resistance (Pa)
Air flow rate, m
3
/h - Pressure correction factor
Power consumption in Watt
Contact resistance (Pa)
Air flow rate, m
3
/h - Pressure correction factor
Extract air side (with F7 filter)
Data for supply air is measured in accordance with ISO 5136,
"In-duct method".
Radiated noise is measured in accordance with ISO 9614-2.
Bruel & Kjær measuring equipment, type 2260.
Air capacity at various capacity settings in Volt.
Supply air fan power consumption at various capacity settings.
Sound power level Lw
A, cf. correction table.
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