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Acoustic Louvres

Acoustic Louvres gl 2
Acoustic Louvres gl 3
Acoustic Louvres gl 4
Acoustic Louvres gl 5
Acoustic Louvres gl 6
Acoustic Louvres gl

The Crossflow ALS (CALS) range is a fabricated acoustic louvre designed for commercial projects where reduction in sound transmission is required whilst maintaining weathered ventilation.

The CALS louvre is suitable for all applications and can be both vertically and horizontally mounted into pre-formed structural opes. The modular units can be manufactured to suit specific dimensions on site.

Each louvre blade is filled with a sound absorption mineral wool to achieve the required acoustic performance. They are quick to install with all fixings being grade A4 stainless steel and are virtually maintenance free

Materials

Louvre Options

Crossflow Acoustic Louvres - Sound Transmission

Model Louvre Depth (mm) 63 125 250 500 1K 2K 4K 8K
CALS 100 100 5 4 5 6 9 13 14 13
CALS 150 150 6 6 8 10 14 18 16 15
CALS 275 275 6 5 8 9 17 17 14 14
CALS 300 300 6 7 10 12 18 18 14 13
CALS 300 C 300 6 6 8 13 18 20 16 17
CALS 600 C 550 7 9 12 24 31 33 29 30

How to specify Crossflow CALS Louvres

Supply and install CALS louvres as manufactured by Crossflow Ltd. Outer frame casing shall be made from 18 gauge (1.2mm) galvanised steel. Louvre blades shall be made from 22 gauge (0.7mm) galvanised steel. Louvre blades to be filled with acoustic medium-tissue faced, non-toxic, vermin and moisture proof mineral wool to achieve the required acoustic performance as indicated.

Standard Acoustic Louvre

CALS – 100 ACOUSTIC PERFORMANCE
Octave band Centre frequency (Hz) 63 125 250 500 1000 2000 4000 8000
Transmission Loss (dB) 5 4 5 6 9 13 14 13
CALS – 100 AERODYNAMIC PERFORMANCE
Static Pressure Drop (N/m2) 10 20 30 40 50 60 70 80 90 100
Face Velocity (m/s) 0.92 1.30 1.59 1.84 2.05 2.25 2.43 2.61 2.76 2.90
Nominal Free Area (%) 42%

Standard Acoustic Louvre

CALS – 150 ACOUSTIC PERFORMANCE
Octave band Centre frequency (Hz) 63 125 250 500 1000 2000 4000 8000
Transmission Loss (dB) 6 6 8 10 14 18 16 15
CALS – 150 AERODYNAMIC PERFORMANCE
Static Pressure Drop (N/m2) 10 20 30 40 50 60 70 80 90 100
Face Velocity (m/s) 0.53 0.73 0.90 1.04 1.16 1.28 1.37 1.47 1.56 1.64
Nominal Free Area (%) 32%

Standard Acoustic Louvre

CALS – 275 ACOUSTIC PERFORMANCE
Octave band Centre frequency (Hz) 63 125 250 500 1000 2000 4000 8000
Transmission Loss (dB) 6 5 8 9 17 17 14 14
CALS – 275 AERODYNAMIC PERFORMANCE
Static Pressure Drop (N/m2) 10 20 30 40 50 60 70 80 90 100
Face Velocity (m/s) 0.90 1.15 1.48 1.79 2.05 2.15 2.40 2.60 2.77 2.84
Nominal Free Area (%) 42%

Standard Acoustic Louvre

CALS – 300 ACOUSTIC PERFORMANCE
Octave band Centre frequency (Hz) 63 125 250 500 1000 2000 4000 8000
Transmission Loss (dB) 6 7 10 12 18 18 14 13
CALS – 300 AERODYNAMIC PERFORMANCE
Static Pressure Drop (N/m2) 10 20 30 40 50 60 70 80 90 100
Face Velocity (m/s) 0.94 1.31 1.61 1.83 2.13 2.27 2.46 2.63 2.84 2.99
Nominal Free Area (%) 45%

Chevron Acoustic Louvre

CALS – 300 ACOUSTIC PERFORMANCE
Octave band Centre frequency (Hz) 63 125 250 500 1000 2000 4000 8000
Transmission Loss (dB) 6 6 8 13 18 20 16 17
CALS – 300 AERODYNAMIC PERFORMANCE
Static Pressure Drop (N/m2) 10 20 30 40 50 60 70 80 90 100
Face Velocity (m/s) 0.91 1.26 1.49 1.70 2.01 2.08 2.25 2.31 2.60 2.70
Nominal Free Area (%) 45%

Chevron Acoustic Louvre

CALS – 600 ACOUSTIC PERFORMANCE
Octave band Centre frequency (Hz) 63 125 250 500 1000 2000 4000 8000
Transmission Loss (dB) 7 9 12 24 31 33 29 30
CALS – 600 AERODYNAMIC PERFORMANCE
Static Pressure Drop (N/m2) 10 20 30 40 50 60 70 80 90 100
Face Velocity (m/s) 0.68 0.94 1.15 1.30 1.47 1.61 1.77 1.89 2.02 2.13
Nominal Free Area (%) 45%

Isolamin Panels

The Isolamin panel is a self-bearing panel with high durability and excellent sound reduction that offers one of the market’s most useful and flexible joint systems.
Features & Benefits

Custom Deliveries

The wall system is normally delivered with custom height and width modules as per customer drawings, enabling efficient installations by eliminating the need for cutting on site.

Aesthetic Finishes

The Isolamin surface finish program includes everything from transparent lacquered galvanized finish, painted finishes, or PVC-clad decorative finish, to stainless steel plate or lacquered aluminium for demanding environments.

Thermal Insulation

Panels thickness can be adjusted according to thermal insulation requirements. The mineral wool core can also be replaced with EPS insulation if there are no demands for fire insulation or sound insulation

Sound Absorption

The various panel designs handle sound reduction from 28 up to 49 dB Rw.

Flexible & Easy Installation

The Isolamin wall system is easily adaptable to existing dimensions at the job site for any last-minute changes. Components can be easily cut and drilled onsite. The profile system also includes solutions for flush installations, with no components projecting from wall surfaces.

Durability

The Isolamin wall system is manufactured with high density, cross-layered mineral wool, glued in staves which produces an extremely strong sandwich construction making the installation self-bearing.

Fire Safety

The mineral wool core is entirely non-flammable and fulfils fire safety demands up to El120. The polyester-painted surface finish is entirely free from halogens, and PVC-clad surfaces comply with surface finish class 1 in accordance with the Swedish National Board of Housing, Building and Planning.

TESTIMONIALS

What Our Client Say

ESB have had a good working relationship with Crossflow for more than 25 years in ESB Head Office. Crossflow have conducted the preventive maintenance schedule on time, by always been proactive with any follow up actions required from PPM and responded to call outs within SLA. Crossflow have always invoiced on time with no delays.

Peter Murphy

ESB Facilities Manager
Crossflow Air conditioning has completed a large number of projects for various clients that we have been associated with over the last 20 – 25 years. At all times they have shown an appreciation for service, both in the initial construction phase and more importantly in the follow-on after sales maintenance phase.

Dean Brassington

Consultant Eng. for Allianz Worldwide Care
Thank you for the professional and efficient job Crossflow carried out for us with respect to installing the new FSAI Mitsubishi AC System. It is good to know that we now have some level of redundant cooling system within the environment.

Marc Kane

Food Safety Authority of Ireland

Any Questions?

We would be delighted to assist your query.
Contact our Technical Customer Service Team today on +353 1 427 9300 or enquiries@crossflow.ie.

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