Sound attenuating transfer unit designed for installation in studded walls, produced as rectangular baffles containing insulating sound absorbing material covered by a reinforced surface layer, rated to fire resistance class B-s1,d0 conforming to EN ISO 11925-2. Open slots in the short sides. The baffles are to be hung up on mounting frames supplied.
The sound baffle and mounting frame are made of galvanised sheet steel. The baffle is painted.
Other colours are available on enquiry. The front of the transfer unit can be provided with text, such as the company name. Please contact your nearest sales office for information.
| AIR FLOW - PRESSURE DROP - Rw | ||||||||
| SOTTO Size | Hole in wall (mm) | 10 Pa | 15 Pa | 20 Pa | Rw=Dn,ew (dB) | |||
| l/s | m3/h | l/s | m3/h | l/s | m3/h | |||
| 80-100 | 80 | 14 | 50 | 17 | 61 | 19 | 68 | 55 |
| 80-100 | 100 | 16 | 58 | 19 | 68 | 23 | 83 | 55 |
| 125-160 | 125 | 21 | 76 | 25 | 90 | 29 | 104 | 51 |
| 125-160 | 160 | 23 | 83 | 27 | 97 | 31 | 112 | 51 |
| The data applies to installation in a 100 mm thick studded wall with a 10 m² transmission area. One transfer diffuser on each side of the wall. | ||||||||
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