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.

Dimension	Length	Static integral attenuation, dB to ISO 7235
(mm)	(mm)	63	125	250	500	1K	2K	4K	8K
100	500	7	10	15	28	41	48	37	25
100	800	8	13	22	36	49	50	47	28
100	1100	9	15	29	44	50	50	50	39
125	500	5	9	13	25	34	40	34	18
125	800	6	12	19	34	44	50	40	26
125	1100	7	15	24	43	50	50	46	34
160	500	5	8	13	21	29	35	19	15
160	800	6	11	18	29	39	45	30	21
160	1100	7	14	23	37	50	50	41	26
200	500	5	6	11	17	22	25	15	13
200	800	5	8	14	24	34	38	22	18
200	1100	6	10	18	31	46	51	29	20
250	500	4	5	8	14	20	18	10	7
250	800	4	7	11	19	27	27	14	10
250	1100	5	9	14	24	35	37	19	12
315	500	3	6	7	11	14	10	8	3
315	800	3	7	10	16	21	17	10	5
315	1100	4	8	12	21	29	24	12	7
400	500	3	6	6	11	14	10	7	4
400	800	3	6	8	15	19	13	8	4
400	1100	4	7	10	19	24	16	9	4

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Include Accessory documents

Document	Article	Document type	Date
Sound attenuator for circular ducts (pdf 309.19kB)	SORDO-C	Technical catalogue	20/02/2025
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
Installation, Maintenance (pdf 179.01kB)	SORDO-C	IOM Manual	21/02/2025