CLA-B

Compact sound attenuator with centre baffle for circular ducts

Extremely low profile
Center baffle
Very good sound attenuation
Mineral wool with fiber migration prevention
Air tightness class D
M1 classified
Available with RE:3 recycled steel
Low pressure drop
Galvanized sheet steel to Environmental Class C3

CLA-B is a compact rectangular sound attenuator with circular duct connections, featuring low installation height, a special liner to prevent the migration of insulating materials into the airstream, and a center baffle for outstanding sound attenuation.

Dimension	Length	Static integral attenuation, dB to ISO 7235
(in.)	(in.)	63	125	250	500	1K	2K	4K	8K
10	20	5	6	8	14	24	32	20	9
10	39	7	12	17	30	43	40	34	16
12	20	4	6	8	14	25	19	14	8
12	39	6	10	14	26	45	42	21	12
16	20	4	6	8	14	22	16	10	6
16	39	5	9	14	23	40	24	13	9
20	24	4	5	15	23	29	20	15	14
20	35	4	6	15	23	29	20	15	14
20	47	5	7	16	24	30	22	16	14
25	24	3	4	12	19	22	17	12	9
25	35	3	5	12	19	22	17	12	9
25	47	4	6	13	20	23	18	12	10
31	24	2	2	10	12	11	7	6	2
31	35	2	3	10	12	11	7	6	2
31	47	3	4	11	13	11	8	7	3

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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	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
Compact sound attenuator with centre baffle for circular ducts (pdf 305.39kB)	CLA-B	Technical catalogue	9/6/2024