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CALMO

Sound attenuator with recessed connection for rectangular ducts

Very compact rectangular attenuator
Excellent aerodynamic characteristics
Vet low pressure drop via baffle staging
Environmentally friendly acoustic material, approved by independent test institute: ISOVER Cleantec^® PLUS
Washable surface layer ISOVER Cleantec^® PLUS
Available with inspection hatch
Fire protected version with 50 mm mineral wool also available
Connection dimensions from 400x300 mm to 2200x2200 mm
Can be supplied in kit form
Standard of galvanized sheet steel to Corrosivity class C3
Included in the MagiCAD database

CALMO is, due to its unique design with connection facing the side baffles, is suitable for use both in ducts and in direct connection to the air handling unit.

Technical description

Design

Material and surface treatment

The CALMO is made as standard of galvanized sheet steel to Corrosivity class C3 (VVS-AMA 2019 Standard). The ISOVER Cleantec^® PLUS sound attenuating material has been granted type approval. (Type approval no. 2706/92 with regard to cleaning, fibre entrainment, resistance to ageing emissions, washable surfaces, etc. The standard CALMO is supplied with slip clamp connections.

Installation, commissioning and maintenance

CALMO T1

Uninsulated cleaning cover

CALMO T2

Fire-resistant insulated cleaning cover

CALMO T3

The sound attenuator is supplied insulated with 50 mm thick fire-resistant stone wool.

CALMO T4

Perforated sheet metal lining.

Nordic Swan listed

The product is listed in the database for building products that can be used in Nordic Swan Ecolabelled buildings.

Filter

Include Accessory documents

Document	Article	Document type	Date
Approval 2706/92, Duct insulation (pdf 276.09kB)	ISOVER Cleantec PLUS	Quality	08/09/2022
Installation, maintenance (pdf 72.95kB)	MORENDO, CALMO, CADENZA, LARGO, LENTO	IOM Manual	03/05/2022
Attenuator with recessed connection for rectangular ducts (pdf 440.92kB)	CALMO	Technical catalogue	03/05/2022
Building product declaration (pdf 80.02kB)	CALMO	Quality	08/01/2021
Installation instruction (pdf 366.78kB)	Slip-clamp and Euroflange	IOM Manual	04/05/2023
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

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.

CALMO - Standard range
Measurement (mm)			Working range	Attenuation
B	H	L	m³/s	dB(A)
400-2200	300-2200	650-2450	0-40	10-35