Wolf BWL-1S-07 - Sound Pressure Level L; Calculation Based on Sound Power Level, Distance and Directivity

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Soundlevel
Q = 4: Heat pump or air intake/discharge (indoor installation) on a house wall
Q = 8: Heat pump or air intake/discharge (indoor installation) on a house wall with recessed corner in exterior wall
31.3 SoundpressurelevelL
PA
calculationbasedonsoundpowerlevel,distanceand
directivity
Sound power level L
WA
dB(A)
Appliance type Max. "Max. night
75 %"
"Max. night
65 %"
"Max. night
55 %"
"Max. night
45 %"
BWL-1S(B)-05/230 V 60 57 57 56 56
BWL-1S(B)-07/230 V 63 59 57 56 56
BWL-1S(B)-10/400 V 64 59 58 57 57
BWL-1S(B)-14/400 V 65 60 59 58 57
BWL-1SB-10/230 V 65 60 59 58 58
BWL-1SB-14/230 V 64 61 60 59 58
BWL-1S(B)-16/400 V 66 61 60 59 57
Night mode can reduce the maximum noise emissions.
It should be noted that this also decreases the maximum performance.
DirectivityQ Distance from sound source
1 m 2 m 4 m 5 m 6 m 8 m 10 m 12 m 15 m
DifferentialΔLinrelationtosoundpowerlevelL
WA
measured in dB(A) at the outdoor module
Q=2(outdoorinstallation) 8 14 20 22 23.5 26 28 29.5 31.5
Q=4(installationupto3mfromawall) 5 11 17 19 20.5 23 25 26.5 28.5
Q=8 (installation in a corner, up to 3 m from the walls) 2 8 14 16 17.5 20 22 23.5 25.5
Formula:
L
PA
= L
WA
-ΔL
Example:
BWL-1S-07/230V;Q=4installationonahousewall;distance8m
Max. sound pressure level = 63 dB(A) - 23 dB(A) = 40 dB(A)
Max. sound pressure level, night 55 % = 56 dB(A) - 23 dB(A) = 33 dB(A)