Zehnder Rittling ComfoAir 70 Operating Manual And Assembly page 30

Sound Pressure Level
(Lp in 3 m distance A = 10m²)
Device without two-room connection
Device with two-room connection
Device with two two-room connections
Standard noise level difference
P-V- Characteristic Curve
30
Value
FS1: 10,6 dB(A)
FS2: 23,1 dB(A)
FS3: 29,0 dB(A)
FS4: 35,9 dB(A)
FS1: 7,9 dB(A)
FS2: 15,4 dB(A)
FS3: 22,9 dB(A)
FS4: 30,8 dB(A)
FS1: 2,7 dB(A)
FS2: 14,7 dB(A)
FS3: 15,3 dB(A)
FS1: 22,3 dB(A)
Flap closed: 48 dB
Flap open: 40 dB