SOTTO

Sound attenuating transfer unit

For the transfer of air through a wall
Fits in a circular cut opening
Simple to install
Accessories:
- TRAC disc valve
- VGC telescopic wall sleeve
Standard colour White RAL 9003
- 5 alternative standard colours
- Other colours upon request

Calculate with your requirements

AIR FLOW - PRESSURE DROP - Rw
SOTTO Size	Hole in wall (mm)	10 Pa		15 Pa		20 Pa		Rw=Dn,ew (dB)
SOTTO Size	Hole in wall (mm)	l/s	m3/h	l/s	m3/h	l/s	m3/h	Rw=Dn,ew (dB)
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.

Nordic Swan listed

The product is listed in the database for building products that can be used in Nordic Swan Ecolabelled buildings.

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Include Accessory documents

Document	Article	Document type	Date
Sound-attenuating transfer unit (pdf 544.26kB)	SOTTOa	Technical catalogue	21/03/2022
Installation, commissioning, maintenance (pdf 363.21kB)	SOTTOa	IOM Manual	20/05/2019
Transfer air solutions (pdf 970.08kB)	ALS, CLA-A, GRC, SOTTO	Brochure	06/11/2023
Overview - Air diffusers (pdf 3.34MB)	Air diffusers	Brochure	12/07/2022
Commissioning guide - Air diffusers, VAV/CAV- & Commissioning dampers (pdf 7.75MB)	Air diffusers, VAV/CAV- & Commissioning dampers	IOM Manual	19/08/2024
Product description - Air diffusers & dampers (pdf 249.19kB)	Air diffusers & dampers	IOM Manual	19/10/2023
Nano certificate (pdf 71.51kB)	Air diffusers	Quality	03/10/2023

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