External Louvres - Variant NL

Description

• 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

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

Nominal 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: 300, 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