3UL
Product Information
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
Technical Information
Performance data
- 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
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
Installation
- 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
Accessories
- 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
General Information
- 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
Contact Us
For more information about the 3UL, or to find out how Colt can help with your project, get in touch with our team today.