SORDO-C

Sound attenuators for circular ducts

100 mm mineral wool
Excellent noise attenuation
Low pressure drop
Built for a low CO2 footprint (Ø 100–400)
Ø 100–400 with air tightness class D
Ø 500–800 with air tightness class C
Fire-resistance corresponding to class EI30 to EI120*
*See the table for requisite safety distance

Calculate with your requirements

SORDO-C is part of Swegon’s RE:3 concept based on the key principles of circularity, and which consists of RE:duce, RE:use and RE:vitalise. SORDO-C dim. 100 to 400 is made with sustainable sheet metal called RRP, where RRP stands for “recycled and renewably produced”. The steel has a recycled steel content of at least 75 per cent. In addition, the manufacturing process uses electric arc furnaces that run on 100 per cent renewable energy.

Read more about RE:3 here.

Design

Material and surface treatment

SORDO-C dim. 100 to 400

Made of RRP galvanised sheet steel corresponding to environmental class C3 (equivalent to M2 as per AMA VVS2016). This produces a significantly reduced CO2 footprint.
Sound attenuating materials: 100 mm thick mineral wool. Fibre migration-secured thanks to our solution with self-supporting surface layer, approved with regard to cleaning, fibre migration, ageing resistance, emissions, etc.
The connection spigots are fitted with rubber seals

SORDO-C dim. 500 to 800

Made of galvanised sheet steel to environmental class C3 (equivalent to M2 as per VVS-AMA 98).
Sound attenuating materials: 100 mm thick long-fibred compressed mineral wool lined with EUROLON. The sound attenuating material is also covered with perforated sheet steel outside the EUROLON layer
The connection spigots are fitted with rubber seals.

Installation, commissioning and maintenance

The product’s connection spigots are designed for connection to ducts only.

It is important to drive screws or pop rivets into the 25-mm sheet-metal edge which is fastened and located inside the connection spigot.

The product can be mounted by means of approved hangers that satisfy the provisions to load bearing capacity rating R corresponding to the fire resistance the structural element of the building, for example load bearing capacity rating R 60 for elements of structure to fire-resistance class EI60.

Dimension	Length	Static integral attenuation, dB to ISO 7235
(mm)	(mm)	63	125	250	500	1K	2K	4K	8K
100	500	5	7	12	24	37	45	35	24
100	800	6	10	19	32	45	50	45	27
100	1100	7	12	26	40	50	50	50	38
125	500	3	6	10	21	30	37	32	17
125	800	4	9	16	30	40	50	38	25
125	1100	5	12	21	39	50	50	44	33
160	500	3	5	10	17	25	32	17	14
160	800	4	8	15	25	35	42	28	20
160	1100	5	11	20	33	46	50	39	25
200	500	3	3	8	13	18	22	13	12
200	800	3	5	11	20	30	35	20	17
200	1100	4	7	15	27	42	48	27	19
250	500	2	2	5	10	16	15	8	6
250	800	2	4	8	15	23	24	12	9
250	1100	3	6	11	20	31	34	17	11
315	500	1	3	4	7	10	7	6	2
315	800	1	4	7	12	17	14	8	4
315	1100	2	5	9	17	25	21	10	6
400	500	1	3	3	7	10	7	5	3
400	800	1	3	5	11	15	10	6	3
400	1100	2	4	7	15	20	13	7	3

Filter

Include Accessory documents

Document	Article	Document type	Date
Acoustics Overview (pdf 2.43MB)	CLA-A, CLA-B, SORDO-A, SORDO-B, SORDO-C, SORDO-P, SORDO-PF, CALMO, CADENZA, LARGO, LENTO, MORENDO, FACILE, ALD, CTM, CTK	Brochure	08/04/2023
Building product declaration (pdf 48.49kB)	SORDO-C	Quality	24/05/2018
Sound attenuator for circular ducts (pdf 309.19kB)	SORDO-C	Technical catalogue	20/02/2025
Installation, Maintenance (pdf 179.01kB)	SORDO-C	IOM Manual	21/02/2025

Whilst we have made every effort to ensure information on this website is up to date and accurate, the technical specification and availability of products/services listed on this website may vary market to market and are subject to change without notice. Please contact your regional representative or visit your local website for further details.