USE

Sound attenuating transfer unit

Transfer unit with integrated sound absorption for installation in drywalls
Available in Z- or T-shaped design
Enables air flow between rooms where duct routing is limited, e.g. lack of suspended ceiling
Lined with sound-absorbing material class B1 (melamine resin) or A2 (mineral wool)
Available without diffuser front for shadow gap installation

T-shape with front panel (neck height C: 45 mm)
Length	Height H (mm)	Dn,e,w (dB)	RW (dB)*	RW (dB)**
500	350	45	19	27
1000	350	43	20	28
T-shape without front panel (neck height C: 25 mm)
Length	Height H (mm)	Dn,e,w (dB)	RW (dB)*	RW (dB)**
500	350	48	19	30
1000	350	45	19	30

Z-shape with front panel (neck height C: 45 mm)
Length	Height H (mm)	Dn,e,w (dB)	RW (dB)*	RW (dB)**
500	350	40	14	22
1000	350	37	14	22
Z-shape without front panel (neck height C: 25 mm)
Length	Height H (mm)	Dn,e,w (dB)	RW (dB)*	RW (dB)**
500	350	43	14	25
1000	350	40	14	25
RW: Weighted sound reduction index in relation to the wall opening RW*: Weighted sound reduction index in relation to the length x height of the air transfer element RW = Dn,e,w + 10 x log (S/A0)