SOTTO

Sound attenuating transfer unit

For the transfer of air through a wall
Fits in a circular wall opening
Simple to install
Accessories:
- VGR telescopic wall sleeve
- TRAC disc valve
Standard color White RAL 9003
- Other colors upon request

SOTTO is a rectangular sound-attenuating transfer grille unit with beveled top and bottom edges designed for installation in studded walls. It has concealed fastening, sound-absorbing inner and outer wall plate baffles, a mounting frame, and a telescoping installation sleeve that prevents air leakage into the wall cavity.

AIR FLOW - PRESSURE DROP - Rw
SOTTO Size	Hole in wall (in)	0.04 inWC cfm	0.06 inWC cfm	0.08 inWC cfm	Rw=Dn,ew (dB)
SOTTO Size	Hole in wall (in)	0.04 inWC cfm	0.06 inWC cfm	0.08 inWC cfm	Rw=Dn,ew (dB)
80-100	3.1	30	36	40	55
80-100	3.9	34	40	49	55
125-160	4.9	44	53	61	51
125-160	6.3	49	57	66	51
The data applies to installation in a 4 in thick studded wall with a 108 sq ft transmission area. One transfer diffuser on each side of the wall.

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Include Accessory documents

Document	Article	Document type	Date	Download
Sound-attenuating transfer unit (pdf 544.26kB)	SOTTOa	Technical catalogue	3/21/2022
Installation, commissioning, maintenance (pdf 363.21kB)	SOTTOa	IOM Manual	5/20/2019