SORDO-A

Sound attenuators for circular ducts

50 mm mineral wool
Air tightness class D
M1 classified
Built for a low CO2 footprint
Excellent noise attenuation
Low pressure drop
Fire-resistance class EI30 to EI120*
*See the table for requisite safety distance

Calculate with your requirements

SORDO-A 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-A 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	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

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Include Accessory documents

Document	Article	Document type	Date
Sound attenuator for circular ducts (pdf 339.23kB)	SORDO-A	Technical catalogue	24/02/2025
Building product declaration (pdf 50.46kB)	SORDO-A	Quality	24/05/2018
Type approval (pdf 143.15kB)	SORDO-A	Quality	14/11/2024
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
M1 Certificate (pdf 167.9kB)	CLA-A; SORDO-A	Quality	12/05/2023
Environmental Product Declaration (pdf 836.98kB)	SORDO-A	Quality	09/12/2024
Installation, Maintenance (pdf 179.01kB)	SORDO-A	IOM Manual	21/02/2025