COLT Universal Louvre Brochure
A concise overview of the 1UL, 2UL and 3UL louvre systems.
Louvres
Universal Louvre – 3UL
Triple Bank Universal Louvre
Colt 3UL is a triple-bank louvre system engineered for maximum rain defence without compromising airflow. Available in shallow (50 mm) or deep (100 mm) front blade pitches, it offers integrated drainage through hollow mullions and a clip-on design to accommodate thermal movement. Ideal for exposed façades, plant rooms in harsh environments, and architectural screening where weather resistance is critical.
Product Highlights
- Triple-bank blade design for maximum rain defence
- Available in 50 mm (shallow) or 100 mm (deep) pitch
- Integrated drainage via hollow mullions
- Clip-on blades accommodate thermal expansion
- Corrosion-resistant materials for durability
- Suitable for harsh environments and exposed façades
Universal Louvre – 3UL
Technical Information
Performance Ratings
Rain Defence Classification: Class A (up to 2.0m/s suction velocity – BS EN 13030)
Aerodynamic Coefficient (Cv): Air Inlet ≈ 0.194
Airflow Resistance: Low, with enhanced rain protection
Free Area: 57% depending on configuration (varies by size and pitch) using Industry standard measurement
Applications
- Exposed or weather-prone façades
- Rooftop plant room enclosures
- HVAC systems requiring maximum rain defence
- Ventilation in harsh environments (coastal, industrial)
Materials & Finishes
Materials Available:
- Aluminium (standard – corrosion-resistant)
- Mild or galvanised steel (optional)
- Stainless steel (optional, 50 mm pitch only)
Finish Options:
- Mill finish
- Polyester powder-coated (RAL colours)
- Anodised aluminium
- Pre-coated steel to match cladding
Design & Construction
Blade Type: Triple-bank roll-formed blades
Front Blade Pitch Options:
- Shallow: 50 mm
- Deep: 100 mm
Drainage: Integrated into hollow mullions, discharges via base
Mounting Options: Surface-mounted, recessed, or integrated into cladding
Panel Depth: 198mm shallow – 250mm deep, not including cill projection
Panel Sizes: Modular and customisable
Fixing Method: Clip-on blade system allows thermal movement and clean façade lines
Orientation Options: Horizontal, vertical, or inverted blades
Accessories & Options
- Bird guards or insect mesh
- Blanking panels (single-skin or insulated)
- Acoustic louvre integration (CALM modules)
- Mitred corners and architectural framing
- Doors, turrets, and custom-shaped panels
- Optional decorative or perforated faceplates
Installation & Maintenance
- Supplied as pre-assembled panels or flat-pack kits
- Designed for quick installation with concealed fixings
- Clip-on blades simplify handling and allow thermal expansion
- Low maintenance: periodic cleaning ensures performance
Testing & Compliance
Tested to BS EN 13030:2001 & HEVAC 4th Edition (Test Conditions: 13m/s wind, 75mm/hr simulated rainfall) and manufactured under ISO 9001.
Rain Defence Classification: Class A (up to 2.0m/s suction velocity)
Aerodynamic Classification: Cv Class 1-2; Air Inlet ≈ 0.194
Test Conditions: Simulated wind: 13 m/s; Rainfall: 75 mm/h
Universal Louvre – 3UL
Downloads
Download the COLT Universal Louvre brochure or contact ALUMADE® for project-specific technical information.
View brochure
3UL technical information
Performance data, drawings and configuration information can be coordinated for your project.
COLT Louvre Systems