Introduction
The document introduces the Levolux VLS50XHP/DF, a high-performance ventilation louvre system designed and manufactured in Britain. It combines efficient airflow and weather resistance, outperforming other systems over the past 25 years.

Features & Benefits
The louvre system is aesthetically pleasing with a unique aerodynamic shape, virtually maintenance-free due to its all-aluminium assembly, and reduces energy costs by minimizing air resistance. It offers flexibility in installation and is highly efficient in both ventilation and weather protection.

Performance
The VLS50XHP/DF is noted for its aerodynamic efficiency and weather resistance, providing excellent ventilation and rain defense. It has been tested to EN13030 Edition 5 standards, outperforming other systems.

The Range
The system can be pitched at 50mm and 75mm, matching standard VLS50 and 75 systems. Accessories include insect mesh, doors, flashings, and insulation panels. Finishes are available in anodised, mill finish, or powder-coated RAL colors.

System Construction
The system includes mullions, louvres, a clipping system, fixing brackets, and flashing. Mullions are adjustable and available in different profiles. Louvres are horizontal aluminium extrusions, and the unique clip system ensures secure installation.

Warranty
Levolux offers a 3-year warranty on their systems, covering free replacement parts if defects occur, provided installation and maintenance instructions are followed.

Weather Effectiveness & Aerodynamic Performance
The document provides detailed performance metrics, including water rejection rates and aerodynamic performance classifications, demonstrating the system's efficiency in various conditions.

Specification
The VLS50XHP/DF is a high-performance 50mm double bank louvre made from aluminium alloy. It features a 50mm blade pitch and is designed for minimal pressure loss and maximum weatherability. The system is tested to EN13030 standards and offers various decorative finishes.