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NL WITH SOUND REDUCTION CHARACTERISTICS
Trox
Price Available on Request
manufacturer
TroxDescription
Acoustic louvres as a protection of air conditioning systems against the direct ingress of rain, leaves and birds into fresh air and exhaust air openings Maximum width of 1800 mm, maximum height of 2250 mm Low differential pressure due to aerofoil blades Low air-regenerated noise All aerodynamic data is measured in aerodynamics and acoustics laboratories Absorption material faced with glass fibre fabric and retained by perforated sheet metal Double bank of louvre blades for demanding acoustic requirements Non-active section, without acoustic function, for a uniform appearance Multi-section constructions for large dimensions OPTIONAL EQUIPMENT AND ACCESSORIES - Powder-coated APPLICATION - Acoustic louvres of Type NL for the fresh air and exhaust air openings of air conditioning systems - Protection against the direct ingress of rain as well as against leaves and birds - Recommended face velocity for fresh air openings: 2 – 2.5 m/s max. - Weather and noise protection with a compact-depth unit SPECIAL CHARACTERISTICS - Two construction depths for normal and demanding acoustic requirements - Aerofoil blades - Absorption material retained by perforated sheet metal NORMAL SIZES B: 300, 450, 600, 750, 900, 1050, 1200, 1350, 1500, 1650, 1800 mm Width subdivided: 1950, 2100, 2250, 2400, 2550, 2700, 2850, 3000, 3150, 3300, 3450, 3600 mm H: 450, 600, 750, 900, 1050, 1200, 1350, 1500, 1650, 1800, 1950, 2100, 2250 mm Height subdivided: 2400, 2550, 2700, 2850, 3000, 3150, 3300, 3450, 3600, 3750, 3900, 4050, 4200, 4350, 4500 mm Any combination of B × H Other dimensions upon request VARIANTS NL: Acoustic louvre NL-H: Double bank for demanding acoustic requirements NL-D: Non-active section for a uniform appearance CONSTRUCTION S: Galvanised sheet steel A: Aluminium PARTS AND CHARACTERISTICS - Casing - Sound absorbing blades (NL, NL-D) - Bird mesh (NL, NL-D) - Blades (NL-D) - Rear blanking plate (NL-D) CONSTRUCTION FEATURES - Aerofoil blades, 150 mm blade pitch - Casing with fixing holes for wall installation - Absorption material faced with glass fibre fabric and retained by perforated sheet metal (NL, NL-H) - Bird mesh 12 × 12 × 1 mm (NL, NL-H) MATERIALS AND SURFACES - Casing and blades made of galvanised sheet steel (S) or aluminium (A) - Perforated sheet metal to retain absorption material is made of galvanised sheet steel (NL, NL-H) - Bird mesh made of galvanised steel (NL, NL-H) - Absorption material is mineral wool (NL, NL-H) MINERAL WOOL - To EN 13501, fire rating class A1, non-combustible - RAL quality mark RAL-GZ 388 - Biosoluble and hence hygienically safe according to the German TRGS 905 (Technical Rules for Hazardous Substances) and EU directive 97/69/EG - Faced with glass fibre fabric as a protection against erosion through airflow velocities of up to 20 m/s - Inert to fungal and bacterial growth STANDARDS AND GUIDELINES - Insertion loss and sound power level of air-regenerated noise tested to ISO 7235 - Sound reduction index determined according to EN ISO 10140-2 und EN ISO 717-1 MAINTENANCE Maintenance-free as construction and materials are not subject to wear
Specification
- WidthUp to 3600 MM
- HeightUp to 4500 MM
- Size300 × 450 to 1800 × 2250 MM
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