CLA-A

CLA-A is a compact sound attenuator for circular ducts

Extremely low installation height.
Very good sound attenuation
Fibre-migration proof
Air tightness class D
M1 classified
Availabe with recycled steel RE:3, "EPD"
Low pressure drop
Mineral wool
Galvanised sheet steel to Environmental Class C3
Fire-resistance class EI30 to EI120*
*See the table for requisite safety distance

CLA-A is available in a RE:3 version. A RE:3 product is an alternative to our conventional products, systems and services, an alternative which is reduced, reused or revitalised. We ensure a notably lower level of embodied carbon, built-in CO2, and let these solutions wear our RE:3 symbol. Read more about CLA RE:3 here.

Dimension	Length	Static integral attenuation, dB to ISO 7235
(in.)	(in.)	63	125	250	500	1K	2K	4K	8K
4	20	7	9	14	26	34	42	35	26
4	39	7	17	26	44	50	50	50	39
5	20	5	9	13	21	29	35	31	20
5	39	7	16	23	39	50	50	47	35
6	20	5	8	13	17	23	31	21	17
6	39	7	13	22	32	45	50	38	25
8	20	5	8	11	15	20	22	14	14
8	39	7	13	20	28	40	45	27	20
10	20	5	6	8	11	15	16	10	7
10	39	6	11	15	20	28	31	18	14
12	20	4	6	7	9	12	8	8	5
12	39	6	10	12	17	24	21	12	7
16	20	4	6	7	9	12	8	6	4
16	39	5	9	12	16	23	14	8	6

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Include Accessory documents

Document	Article	Document type	Date
Building product declaration (pdf 50.23kB)	CLA-A	Quality	5/24/2018
Environmental Product Declaration (pdf 809.51kB)	CLA-A (RE3)	Quality	8/23/2024
Environmental Product Declaration (pdf 789.79kB)	CLA-A	Quality	8/23/2024
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	4/8/2023
Type approval (pdf 137.87kB)	CLA-A, CLA-B	Quality	2/20/2024
Installation, Maintenance (pdf 239.05kB)	CLA-A; CLA-B	IOM Manual	1/15/2024
M1 Certificate (pdf 167.9kB)	CLA-A; SORDO-A	Quality	5/12/2023
Compact sound attenuator for circular ducts (pdf 293.27kB)	CLA-A	Technical catalogue	1/15/2024