Spiral-Duct Drum Louver Standard Blades

NEW! The Airvector® ADLD Series is a high-performance line of drum louvers specifically designed for mounting on round or spiral ducts. Engineered for large open spaces requiring long throws and precise airflow control, the ADLD combines aerodynamic performance with robust construction and architectural integration.

Each unit features a rotatable cylindrical drum with individually adjustable internal vanes, allowing for full control of both vertical trajectory and horizontal air spread. The curved frame ensures direct mounting on round ducts without the need for duct taps, reducing installation time and maintaining a clean, professional finish.

GENERAL FEATURES

• Curved frame mounts directly to spiral or round ducts — no duct tap required
• Adjustable vertical angle up to 60° via rotating drum
• Rear-pivoted internal vanes for horizontal spread control
• Long-throw performance ideal for heating, cooling, or ventilation in large-volume spaces
• Felt seal around drum minimizes air leakage and holds position securely
• Durable extruded aluminum construction with corrosion-resistant powder-coated finish (standard white)
• Surface-mounted design with countersunk screw holes for secure fastening

For Drum Louver Standard Blades – Surface Mount click here to see ADL.