VEX300

VEX unit: VEX340H

Desired output: 500 l/s (6500 m3/h) and pt = 250 Pa

VEX340H, LWA1 - Suction side

 

VEX340H, LWA2 - Pressure side

VEX340H, LWA3 - Pressure side

 

Reading:

 Read LWA1 (extract duct) and LWA2 (pressure ducts) on curve.

LWA1: 73 in range 1 (marked with red dot on diagram)

LWA2: 85.5 in range 1 (marked with red dot on diagram)

Suction side (outdoor air/extract air)

Frequency band  63 125 250 500 1K 2K 4K 8K
 LWA1 58
 Correction factor KW (LW1) read off on diagram 18 8 -11 1 -12 -20 -25 -32
 Sound output level suction side LW1 76 66 47 59 46 38 33 26

Pressure side (supply air/exhaust air)

Frequency band  63 125  250  500  1K  2K   4K   8K
 LWA1 77,5
 Correction factor KW (LW2) read off on diagram  -1 -5  -5 -2  -5 -7 -15 -27
 Sound output level pressure side LW2 76,5  72,5  72,5  75,5 72,5 70,5 62,5 50,5

 

Surroundings (sound output)

Frequency band  63 125  250  500  1K  2K  4K   8K
 LWA3 52
 Correction factor KW (LW3) read off on diagram  20 13 1 -6 -8 -12 -17 -21
 Sound output level surroundings (LW3) 72 65 53 46 44 40 35 31

Surroundings (sound pressure)
Weighting   dB(A)
LWA3 read off in range I  52
Correction factor KpA (LW3) read off on diagram  -15
Sound pressure level surroundings LpA3

 37

 

See measurement setup here.

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