COLT Universal Louvre Brochure
A concise overview of the 1UL, 2UL and 3UL louvre systems.
Louvres
Universal Louvre – 2UL
Double Bank Universal Louvre
Colt 2UL is a versatile double-bank louvre system offering a balance of enhanced rain defence and strong airflow performance. Available in shallow (50 mm) or deep (100 mm) blade pitches, it’s ideal for plant room screening and architectural façades. Featuring concealed drainage via hollow mullions and a clip-on design for thermal movement, it delivers durable, maintenance-free performance in challenging weather conditions.
Product Highlights
- Double-bank blade design boosts rain defence while maintaining airflow
- Available in 50 mm or 100 mm blade pitch for design flexibility
- Integral drainage into vertical mullions improves weather resilience
- Clip-on blade construction accommodates thermal movement, simplifies install
- Corrosion-resistant aluminium, galvanised steel, or stainless materials
- Supports architectural integration with accessories like guards and panels
Universal Louvre – 2UL
Technical Information
Performance Ratings
Rain Defence Classification: Class A to Class D depending on air velocity (Tested to BS EN 13030:2001)
Aerodynamic Classification: Class 3 (Cv approx. 0.21)
Airflow Resistance: Low to moderate resistance with enhanced weather protection
Free Area: 57% (varies by size and pitch) using Industry standard measurement
Applications
- Rooftop plant room enclosures
- Air intake louvres for HVAC and ventilation systems
- Industrial and commercial buildings needing both airflow and rain defence
- Architectural façades requiring concealed or integrated drainage
Materials & Finishes
Materials:
- Aluminium (standard – corrosion-resistant)
- Mild or galvanised steel or stainless steel (custom options)
Finish Options:
- Mill finish
- Polyester powder coated to standard RAL colours
- Anodised aluminium
- Pre-coated steel to match cladding
Design & Construction
Blade Type: Double-bank roll-formed blades
Blade Pitch:
- 50 mm (shallow)
- 100 mm (deep)
Blade Profile: Chevron or aerofoil profile
Drainage System: Integrated into hollow mullions for effective rainwater removal
Free Area: Typically 57% depending on configuration (varies by size and pitch) using Industry standard measurement
Mounting Options: Surface-mounted, recessed, or integrated into cladding
Panel Sizes: Modular – customisable to suit building design
Panel Depth: 143mm shallow -198mm deep, not including cill projection.
Accessories & Options
- Bird guards (galvanised or stainless steel mesh)
- Insect mesh and/or Fly Guard
- Blanking or insulated panels
- Acoustic modules available
- Doors, turrets, and support structures for larger applications
Installation & Maintenance
- Supplied pre-assembled or in kit form
- Designed for fast installation with concealed fixings
- Clip-on blade system accommodates thermal movement
- Low maintenance – periodic cleaning recommended to remove debris
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.
Simulated Conditions: 13 m/s wind, 75 mm/h rainfall
Aerodynamic Classification: Cv Class 2 (approx. 0.308 inlet / 0.285 exhaust)
Rain Defence Classification: Class A at ≤0.5m/s inlet velocity; Class B at 1.0m/s; Class C above 1.5m/s
Universal Louvre – 2UL
Downloads
Download the COLT Universal Louvre brochure or contact ALUMADE® for project-specific technical information.
View brochure
2UL technical information
Performance data, drawings and configuration information can be coordinated for your project.
COLT Louvre Systems