EWL Extruded Weather Louvre

EWL is a single bank extruded weather louvre, providing high performance rain defence. Suitable for applications requiring screening and ventilation.

Class A rain defence

EWL is a single bank louvre system with comparable performance to a double bank louvre, achieving Class A up to 3 m/s.

Features and benefits

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.


Performance

EWL is a single bank extruded weather louvre, providing high performance rain defence. Suitable for applications requiring screening and ventilation.

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

Louvre EWL Horizontal with insect mesh EWL Vertical
Face Velocity (m/s) A - 100% A - 100%
A - 100% A - 100%
A - 100% A - 100%
A - 100% A - 100%
A - 100% A - 100%
A - 100% A - 100%
A - 99,9 % A - 100%
A - 99,3 % A - 100%
B - 95,8 % A - 100%
- A - 99,9%
0.2533 0.2873

 

Specification

Colt EWL Extruded Weather Louvre is a versatile louvre system providing either screening and/or rain defence.

Louvre blades form an aerodynamically efficient profile to achieve a high degree of rain defence. Allowance is made for thermal expansion without distortion along the length of each louvre blade. Water drains efficiently onto the cill through the mullions.

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

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.

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)

Please contact us for more information relating to the application, specification, installation and servicing of this product.

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Datasheet