Air diffuser LDB 20 Classic

Product overview
Adjustable slot diffuser for high comfort. Designed for constant or variable volume flow with individually configurable airflow. Subsequent adjustment possible without additional mechanics for volume flow ranges from 100% down to 20% of nominal flow.

Directional control
Discharge direction adjustable by 180°, factory-set with reproducible positioning at any time. Subsequent adjustment possible in the installed state; almost-closed setting is achievable.

Outlet design
Roller-shaped outlet elements with a 20 mm diameter, high induction and an air-optimized inner contour for rapid reduction of outlet velocity and temperature difference.

Key features

• Roller diameter: 20 mm
• Flow range: from flat ceiling jet to wide jet fanning — up to 17 individual jets per meter of slot row
• Comfort-oriented discharge characteristics

Technical data

• Number of slot rows: 1–4
• Recommended air volume 1-slot: 110 m³/h at 36 dB(A)
• Recommended air volume 2-slot: 190 m³/h at 38 dB(A)
• Recommended air volume 3-slot: 250 m³/h at 31 dB(A)
• Recommended air volume 4-slot: 300 m³/h at 36 dB(A)
• Integrated silencer: optional

Dimensions (length in mm)

• Maximum length: up to 2000 mm
• Profile width [mm]: 31–160

Design / Options

• Adjustable outlet elements
• Connection box with integrated throttling element

Selection of possible edge profiles

• Type 5
• Type 0
• Type 8
• Type 1
• Type 4
• Type 2

Air diffusion
Graphic available showing air diffusion patterns for the product.

Technical specifications

• Model: LDB 20 Classic
• Roller diameter: 20 mm
• Jets: up to 17 individual jets per meter of slot row
• Slot rows available: 1 to 4
• Recommended air volumes (examples): 1-slot 110 m³/h @36 dB(A); 2-slot 190 m³/h @38 dB(A); 3-slot 250 m³/h @31 dB(A); 4-slot 300 m³/h @36 dB(A)
• Profile width range: 31–160 mm
• Maximum length: up to 2000 mm
• Options: adjustable outlet elements; optional integrated silencer; connection box with integrated throttling element