Colt EWL High Performance Weather Louvre

Extruded Weather Louvre

Combining the highest levels of rain defence in a single bank configuration, Colt EWL is a highly effective weather louvre suitable for a wide range of applications across a variety of buildings in an aesthetically appealing design.

Features and benefits

  • High levels of rain defence at various air velocities
  • Aerodynamically efficient
  • Durable and maintenance free
  • Proven performance - Independently tested to EN 13030
  • Easy to install
  • 50mm pitch

Read more

Testing

Independently tested by BSRIA to EN 13030

Compliance

EN13030 is not a harmonised standard, as such no CE mark is required nor can one be applied

Specification

Learn more about product features, spec and options

Performance

Independently tested to EN 13030

  • Class A rain defence to EN 13030 up to 3 m/s suction
  • Class 3 aerodynamic co-efficient

Datasheet

Colt EWL Extruded Weather Louvre

Highly aerodynamically efficient – this reduces air resistance, allowing the plant and the aperture to be minimised thereby saving running costs.

Durable and maintenance free – UL is completely made from corrosion resistant materials.

Thermal expansion of the louvres enabled – the louvres are clipped (and not riveted or screwed) to structural supporting mullions.

Proven performance - EWL has been tested to EN 13030:2001.

Easy to install – EWL can either be delivered to site pre-assembled or as a kit of parts.

50mm pitch

If noise reduction is required, acoustic louvre panels can be placed behind EWL.

Rain defence and aerodynamic performance (independently tested to EN 13030)

Louvre       Face Velocity (m/s)         CV

 

0.0 m/s 0.5 m/s 1.0 m/s 0.0 m/s 1.5 m/s 2.0 m/s 2.5 m/s 3.0 m/s 3.5 m/s 3.75 m/s Class
EWL Horizontal
with insect mesh

A
100%

A
100%
A
100%
A
100%
A
100%
A
100%
A
99.9%
A
99.3%
B
95.8%
- 0.253
3
EWL Vertical A
100%
A
100%
A
100%
A
100%
A
100%
A
100%
A
100%
A
100%
A
100%
A
99.9%
0.287
3

SPECIFICATION

Standard product features

Type:

  • Static louvre

Materials:

  • Extruded blades: Aluminium 6063-H T5
  • All other components: Aluminium 3005 H14

Louvre blade pitch and angle:

  • 50mm pitch at 45°

Seals:

  • Not required

Product specification

Configuration

  • Horizontal
  • Vertical

Blanking panels

  • None
  • Single skin aluminium panel, mill finish
  • Single skin aluminium panel with external decorative polyester powder paint finish to match louvres
  • Insulated panel

Noise control

Ancillary items

  • None
  • Turret unit(s)

Product Options

Product reference:

  • EWL – extruded weather / rain defence louvre offering excellent performance for normal and weathered ventilation applications.

Finish:

  • Available in mill finish aluminium or polyester powder coating. Consult with Colt for availability of colours and to obtain samples.

Polyester powder coating coverage:

  • Total: All exposed surfaces and edges of components and assemblies are coated excluding fixings, rivets and insect guards
  • Partial: Only external louvre blades and frames, corners and cills are coated, the remaining components are mill finish.

Frame:

  • The louvres are available with either an internal or external flange frame.

Guards:

  • When guards are used, the louvre design should allow for additional resistance to airflow and reduced flow rate performance.

Bird guards:

  • Available in aluminium, galvanised steel and stainless steel

Insect mesh:

  • Available in aluminium – 5000 series AL99.5 alloy – bright (mill) finish

Fixing:

  • Consult with Colt for recommendations and details.