• Louvre systems are popular with designers for many applications in industrial and commercial buildings. Their purpose can be to control light entry, to provide ventilation whilst maintaining rain defence, to provide screening, or a combination of these. They can also be provided simply for aesthetic impact.

    This brochure describes Colt’s range of screening, ventilation and rain defence louvre systems, as well as acoustic louvres.

  • Aesthetically pleasing.
    Colt louvre systems have a distinctive sharp louvre profile.

    Reduced energy costs.
    Colt louvre systems are highly aerodynamically efficient. This reduced air resistance allows the plant and the aperture to be smaller thereby saving running costs.

    Enhanced performance.
    Colt louvre systems are both aerodynamically efficient and have a remarkably high resistance to weather.

    Proven performance.
    All Colt louvre systems have been tested to EN 13030:2001.

    Easy to install.
    Colt louvre systems can be either be delivered to site preassembled or as a kit of parts.

    A wide range.
    Colt louvre systems are available in various shapes, configurations, materials, finishes and coatings to meet the requirements of almost any project.

    Louvres can be extruded or rollformed; polyester powder painted, precoated or anodised, perforated, or stucco embossed.

    Besides aluminium and stainless steel profiles, there are all manner of glass, textile, wood, terracotta clay and translucent acrylic louvres available depending upon aesthetic and energetic requirements.

    There are also a wide range of accessories, including single skin or insulated blanking panels, acoustic modules, guards and meshes, doors and turrets.

    Upgradeable louvre.
    Colt can upgrade “live” areas to double or triple bank configurations at a later stage than the installation.

    Design input provided by Colt.
    Colt louvre systems can be uniquely configured to provide the solution to your needs. Software programs are freely available to assist with this. It’s easy to size a panel according to a maximum pressure drop, or to specify the appropriate louvre bank configuration based on a set flow rate and maximum pressure drop.

    With Colt louvre systems, the possibilities are endless.

  • Colt offers two generic types of louvre systems:

    Screening Louvre:
    Single Bank Universal roll formed Louvre and exruded ‘E’ Series ESC Louvre.

    Ventilation and Rain Defence Louvre:
    Double and Triple Bank Universal roll formed Louvre, and ‘E’ Series ERD, a Single Bank extruded rain defence Louvre.

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Perforated louvre allows additional daylight into this partially underground car park.

Arup Fitzrovia, London.
2UL rain defence screens for plant rooms.

William Harvey Hospital, Ashford.
1UL/SH inverted louvre panels.

  • Its consistent appearance and installation flexibility makes the Single Bank Universal Louvre ideal for screening and cladding applications. Single Bank Universal Louvre, 1UL (one louvre deep) is an aerodynamically shaped louvre and has two standard louvre profiles:

    • Shallow (50mm pitch) and
    • Deep (100mm pitch)

    1UL also has two arrangements:

    • Horizontal and Vertical

    Both arrangements can be inverted for roof screens, which is important when wishing to hide items which are high up, such as the lift plant on high rise apartments.

  • There are three standard material options for the principal components:
    • Aluminium • Mild Steel • Stainless Steel (50mm pitch only)

    There are many decorative finish options, including:
    • Mill Finish • Stoved Polyester Powder Paint • Anodised

    Perforated, Stucco and Pre-Coated Louvres are also available on request for larger applications.

    The applied finishes can be supplied in two coverage levels:
    • Total (all principal components) • Partial (louvres and frames only)

  • There are a large selection of optional accessories such as:
    • Mitred Corners • Blanking Panels (Single Skin or Insulated) • Special Shapes • Acoustic Modules • Guards (Bird / Insect* / Security) • Doors • Turrets

    * Insect mesh will result in reduced airflow and additional resistance.

  • A multi purpose louvre system shall be provided to achieve minimum resistance to airflow, with louvre blades to be aerodynamically shaped with no sharp edges or protrusions, to ensure the highest efficiency airflow performance.

    Airflow
    The following minimum aerodynamic coefficients shall be achieved when the louvre panel is tested to BS EN 13030 : 2001 / HEVAC

    Air Inlet - 0.435

    Air Extract - 0.435

    The above aerodynamic coefficients shall be established as a result of full scale wind tunnel tests.

    Rain Defence
    Single bank louvres are ideally applied in sheltered locations or where rain penetration may be acceptable.

    The louvre system will achieve Class D1 when tested at all velocities to BS EN 13030 : 2001 / HEVAC

  • Colt Single Bank Universal Louvre type 1UL having louvre blades at 50mm pitch (shallow section) or 100mm pitch (deep section).

    Construction throughout shall be from high quality corrosion resistant aluminium alloy type 6063 - T5 to BS 1474 : 1978

    Louvre blades shall not be drilled but shall be clipped and not rivetted or screwed to structural supporting mullions. Thus allowing for expansion and contraction along their length without distortion and to provide a continuous external appearance if required.

    Mullions shall be concealed at 1250mm maximum centres and their points of support along their length shall be in accordance with prevailing site wind pressures (as calculated and specified by a structural engineer) in accordance with BS 6399 part 2. Manufactured from 2mm sheet so that associated support steelwork is reduced to a minimum.

    Cill and frames shall contain all peripheral fixings and be manufactured from 2.0 mm sheet.

    • High airflow properties
    • Moderate rain defence properties (subject to location and exposure)

    Equally suited to applications requiring architectural screening or cladding, Colt Single Bank Louvre is ideal where a high airflow is required and where rain defence is not of primary importance.

Xscape, Milton Keynes, UK.
2000m2 of Universal Louvre including both Colt Single Bank and Double Bank Universal rain defence louvre.

Crawley College, Crawley. ERD louvre panels on the plant room, and Solarfin solar shading panels.

Piccadilly Station, Manchester.
A combination of single and double bank louvres, depending on the specific airflow and rain defence requirements.

Piccadilly Station, Manchester.

  • Double Bank Universal Louvre is ideal for applications requiring ventilation with a good degree of rain defence. Double Bank Universal Louvre, 2UL (two louvres deep) and has two front louvre profiles:

    • Shallow (50mm pitch)
    • Deep (100mm pitch)

    2UL also has two arrangements:

    • Horizontal
    • Vertical

    Both arrangements can be inverted.

  • There are three standard material options for the principal components:
    • Aluminium • Mild Steel • Stainless Steel (50mm pitch only)

    There are many decorative finish options, including:
    • Mill Finish • Stoved Polyester Powder Paint • Anodised

    Perforated, Stucco and Pre-Coated louvres (normally applied to front louvres blades and frames only) are also available on request.

    The applied finishes can be supplied in two coverage levels:
    • Total (all principal components) • Partial (louvres and frames only)

  • There are a large selection of optional accessories such as:
    • Mitred Corners • Blanking Panels (Single Skin or Insulated) • Special Shapes • Acoustic Modules • Guards (Bird / Insect* / Security) • Doors • Turrets

    * Insect mesh will result in reduced airflow and additional resistance.

  • A multi purpose louvre system shall be provided to achieve minimum resistance to airflow, with louvre blades to be aerodynamically shaped with no sharp edges or protrusions, to ensure the highest efficiency airflow performance.

    Airflow
    The following minimum aerodynamic coefficients shall be achieved when the louvre panel is tested to BS EN 13030 : 2001 / HEVAC

    Air Inlet - 0.310

    Air Extract - 0.310

    Rain defence
    The louvre system will achieve the following weathering classification when the louvre panel is tested to BS EN 13030 : 2001 / HEVAC

    Class A2 - up to 1m/s suction velocity
    Class B2 - up to 2.2m/s suction velocity
    Class C2 - up to 3.0m/s suction velocity
    Class D2 - up to 3.5m/s suction velocity

    The louvre system shall be drained internally through hollow section vertical mullions which shall discharge water onto the cill.

    The louvre system shall be capable of combining both double bank functional louvre and single bank aesthetic louvre with rear blanking panels on the same elevation without variation in external profile.

  • Colt Double Bank Universal Louvre type 2UL having louvre blades at 50mm pitch (shallow section) or 100mm pitch (deep section, front louvre only).

    Construction throughout shall be from high quality corrosion resistant aluminium alloy type 6063 - T5 to BS 1474 : 1978

    Front louvre blades shall not be drilled but clipped and not rivetted or screwed to structural supporting mullions allowing for expansion and contraction along their length without distortion and to provide a continuous external appearance if required.

    Mullions shall be concealed at 1250mm maximum centres and their points of support along their length shall be in accordance with prevailing site wind pressures (as calculated and specified by a structural engineer) in accordance with BS 6399 part 2. Manufactured from 2mm sheet so that associated support steelwork is reduced to a minimum.

    Cill and frames shall contain all peripheral fixings and be manufactured from 2.0 mm sheet.

    • Good airflow properties
    • Good rain defence properties

    Equally suited to applications requiring architectural screening or cladding with ventilation and a good degree of rain defence.

Western Harbour Tunnel, Hong Kong.
Triple bank facetted circular louvre installed to handle the high air volumes required and to provide maximum rain protection even in typhoon conditions.

Indoor Recreation Centre,
Ma On Shan, Hong Kong.
Universal Louvre for plant room ventilation and for controllable air inlet for the smoke extraction system.

Turbine Surface Technologies, Nottingham, UK.
Customer comment:“Colt was the only company capable of handling a combined package of natural extract ventilation, solar shading louvre and screening & ventilation louvre”.

The Light, Leeds.
Single bank 1UL louvre upgraded to 3UL for “live” areas.

  • Its consistent appearance and installation flexibility makes the Triple Bank Universal Louvre ideal for screening and cladding applications requiring ventilation with maximum rain defence. Triple Bank Universal Louvre, 3UL (three louvres deep) has two front louvre profiles:

    • Shallow (50mm pitch)
    • Deep (100mm pitch) Front louvre only

    3UL also has two arrangements:

    • Horizontal andVerticall
  • There are three standard material options for the principal components:
    • Aluminium • Mild Steel and • Stainless Steel (50mm pitch only)

    There are many decorative finish options, including:
    • Mill Finish • Stoved Polyester Powder Paint and • Anodised

    Perforated, Stucco and Pre-Coated louvres (normally applied to front louvres blades and frames only) are also available on request.

    The applied finishes can be supplied in two coverage levels:
    • Total (all principal components) • Partial (louvres and frames only)

  • There are a large selection of optional accessories such as:
    • Mitred Corners • Blanking Panels (Single Skin or Insulated) • Special Shapes • Acoustic Modules • Guards (Bird / Insect* / Security) • Doors • Turrets

    * Insect mesh will result in reduced airflow and additional resistance.

  • A multi purpose louvre system shall be provided to achieve minimum resistance to airflow, with louvre blades to be aerodynamically shaped with no sharp edges or protrusions, to ensure the highest efficiency airflow performance.

    Airflow
    The following minimum aerodynamic coefficients shall be achieved when the louvre panel is tested to BS EN 13030 : 2001 / HEVAC

    Air Inlet - 0.280
    Air Extract - 0.280

    Rain defence
    The louvre system will achieve the following weathering classification when the louvre panel is tested to BS EN 13030 : 2001 / HEVAC

    Class A3 - up to 3.5m/s suction velocity

    The louvre system shall be drained internally through hollow section vertical mullions which shall discharge water onto the cill.

    The louvre system shall be capable of combining both double bank functional louvre and single bank aesthetic louvre with rear blanking panels on the same elevation without variation in external profile.

  • Colt Triple Bank Universal Louvre type 3UL having louvre blades at 50mm pitch (shallow section) or 100mm pitch (deep section, front louvres only).

    Construction throughout shall be from high quality corrosion resistant aluminium alloy type 6063 - T5 to BS 1474 : 1978

    Front louvre blades shall not be drilled but clipped and not rivetted or screwed to structural supporting mullions allowing for expansion and contraction along their length without distortion and to provide a continuous external appearance if required.

    Mullions shall be concealed at 1250mm maximum centres and their points of support along their length shall be in accordance with prevailing site wind pressures (as calculated and specified by a structural engineer) in accordance with BS 6399 part 2. Manufactured from 2mm sheet such that associated support steelwork is reduced to a minimum.

    Cill and frames shall contain all peripheral fixings and be manufactured from 2.0 mm sheet.

    • Good airflow properties
    • Excellent rain defence properties

    Suited to applications requiring architectural screening or cladding with excellent rain defence protection even with high air intake velocities.

Wales Millenium Centre, Cardiff.
Rough cut wooden 1UL/DH louvres.

Evelina’s Childrens’ Hospital, London.
Plant room louvres and doors.

C-Plex,West Bromich.
Trapezoidal 2UL louvre panels.

  • The E Series is the latest addition to the Colt Universal Louvre range. It is an extruded aluminium, Single Bank Louvre System available in a 75mm pitch configuration.

    ‘E’ Series type ESC offers an alternative solution to screening and cladding applications.

    It is recommended that ‘E’ Series type ESC should not be installed in exposed locations where rain penetration may not be acceptable.

  • Standard material options for the principal components:
    • Aluminium

    There are many decorative finish options, including:
    • Mill Finish • Stoved Polyester Powder Paint • Anodised

    Perforated, Stucco and Pre-Coated Louvres are not available, please see Universal Louvre.

    The applied finishes can be supplied in two coverage levels:
    • Total (all principal components) • Partial (louvres and frames only)

  • There are a large selection of optional accessories such as:
    • Mitred Corners • Blanking Panels (Single Skin or Insulated) • Special Shapes • Acoustic Modules • Guards (Bird / Insect* / Security) • Doors • Turrets

    * Insect mesh will result in reduced airflow and additional resistance.

  • A simple, clean extruded louvre with sharp, crisp edges to give a continuous appearance.

    Airflow
    The following minimum aerodynamic coefficients shall be achieved when the louvre panels is tested to BS EN 13030 : 2001 / HEVAC

    Air Inlet - 0.27
    Air Extract - 0.27

    The above aerodynamic coefficients shall be established as a result of full scale wind tunnel tests.

    Rain Defence
    Single bank louvres should only be applied in sheltered locations or where rain penetration may be acceptable.

    The louvre system will achieve Class D1 when tested at all velocities to BS EN 13030 : 2001 / HEVAC

  • Colt Single Bank ‘E’ Series Louvre type ESC having louvre blades at 75mm pitch.

    Construction throughout shall be from high quality corrosion resistant aluminium alloy type 6063 - T5 to
    BS 1474 : 1978

    Louvre blades shall not be drilled but clipped and not rivetted or screwed to structural supporting mullions. Thus allowing for expansion and contraction along their length without distortion and to provide a continuous external appearance if required.

    Mullions shall be concealed at 1250mm maximum centres and their points of support along their length shall be in accordance with prevailing site wind pressures (as calculated and specified by a structural engineer) in accordance with BS 6399 part 2. Manufactured from 2mm sheet so that associated support steelwork is reduced to a minimum.

    Cill and frames shall contain all peripheral fixings and be manufactured from 2.0 mm sheet.

Kowloon Canton Railway Corporation, Hong Kong.
Colt inverted Universal Louvre is used extensively for this new underground station to provide high volume airflow with rain defence for plant rooms, entrances, vent shafts and external decoration.

ERD rain defence louvre to plantroom enclosures.

National Physical Laboratory, Teddington.
1UL/SH panels with upgradeable 2UL/SH panel sections.

  • ‘E’ Series type ERD is an extruded aluminium, single bank louvre system available in a 75mm pitch configuration.

    ‘E’ Series type ERD offers a competitive solution to screening and cladding applications which require a good degree of rain defence.

  • Standard material for all principal components:
    • Aluminium

    There are many decorative finish options, including:
    • Mill Finish • Stoved Polyester Powder Paint • Anodised

    Perforated, Stucco and Pre-Coated louvres are not available, please see Universal Louvre.

    The applied finishes can be supplied in two coverage levels:
    • Total (all principal components) • Partial (louvres and frames only)

  • There are a large selection of optional accessories such as:
    • Mitred Corners • Blanking Panels (Single Skin or Insulated) • Special Shapes • Acoustic Modules • Guards (Bird / Insect* / Security) • Doors • Turrets

    * Insect mesh will result in reduced airflow and additional resistance.

  • A simple, clean extruded louvre with sharp, crisp edges to give a continuous appearance.

    Airflow
    The following minimum aerodynamic coefficients shall be achieved when the louvre panel is tested to BS EN 13030 : 2001 / HEVAC

    Air Inlet - 0.30
    Air Extract - 0.30

    Rain defence
    The louvre system will achieve the following weathering classification when the louvre panel is tested to BS EN 13030 : 2001 / HEVAC

    Class A2 - up to 0m/s suction velocity

    Class B2 - up to 1.5m/s suction velocity

    Class C2 - up to 2.0m/s suction velocity

    Class D2 - up to 3.5m/s suction velocity

  • Colt Single Bank ‘E’ Series Louvre type ERD having louvre blades at 75mm pitch, shallow section only.

    Construction throughout shall be from high quality corrosion resistant aluminium alloy type 6063 - T5 to
    BS 1474 : 1978

    Louvre blades shall not be drilled but clipped and not rivetted or screwed to structural supporting mullions allowing for expansion and contraction along their length without distortion and to provide a continuous external appearance if required.

    Mullions shall be concealed at 1250mm maximum centres and their points of support along their length shall be in accordance with prevailing site wind pressures (as calculated and specified by a structural engineer) in accordance with BS 6399 part 2. Manufactured from 2mm sheet such that associated support steelwork is reduced to a minimum.

    Cill and frames shall contain all peripheral fixings and be manufactured from 2.0 mm sheet.

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Screening Louvre - 1UL Performance Data

Dimensions
Note: All dimensions are given as internal, external dimensions will vary depending upon material thickness

Ventilation & Rain Defence Louvre - 2UL

Dimensions
Note: All dimensions are given as internal, external dimensions will vary depending upon material thickness

Ventilation & Rain Defence Louvre - 3UL

Dimensions
Note: All dimensions are given as internal, external dimensions will vary depending upon material thickness

Screening Louvre - ‘E’ Series ESC

Dimensions
Note: All dimensions are given as internal, external dimensions will vary depending upon material thickness

Ventilation & Rain Defence - ‘E’ Series ERD

Dimensions
Note: All dimensions are given as internal, external dimensions will vary depending upon material thickness

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Coming Soon

Technical Standards

To help put the performance classifications into perspective the table above shows how “effectiveness” relates to actual rain entry under standard test conditions, which are representative of bad Northern European weather.The effectiveness classification should be specified for the design air inlet velocity through the louvre since it is velocity dependent.

A high coefficient means low resistance and high airflow performance.


Applications

Recommendations for the selection of rain defence louvres, based on actual design inlet air velocities (for exhaust louvres take a velocity of 0 m/s, representing the worst case with the exhaust system switched off):


Classifications for COLT Louvre Systems

Performance specifications should always include the design air inlet (core) velocity.

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Green Revolution of COLT Louvres

  • 1. Colt Louvres are manufactured from high strength aluminium alloy (6063 T5). This product is 100% recyclable material with high recycle content.
  • 2. Owing to its highly inert property, this product requires minimal care and maintenance; hence, the initial investment is paid back by low maintenance cost.
  • 3. Good insulation of Colt Louvres ultimately minimizes the energy cost to building interior and reduces electricity expense associated with air handling unit. Also the product provides proper ventilation and effectively protects both the outside and the inside building from excessive rain water and unforeseeable severe weather elements. This product helps prevent humidity buildup in the building interior environment; therefore, it helps protect precious interior decors and furniture as well as reduce the air conditioning cost at the same time.
  • 4. Colt Louvres is a light weight and cutting-edge construction material; hence, it reduces the heavy and expensive structure traditionally required to support bulky materials.
  • 5. Building architecture and exterior can be upgraded with a wide array of Colt Louvres. The product provides long-lasting visual aesthetic and unparalleled flexibility to support limitless imaginary of architects and designers as well as different functionalities of the building (e.g., door panel, ventilation panel, etc.).
  • 6. Tested by BSRIA, the internationally-acclaimed institution, Colt Louvre products passed two stringent universal standards in building construction (i.e., BS EN 13030 and HEVAC). These tests assure unsurpassed qualities to meet ever increasing expectation of world-class architects and designers.
  • 7. The product promotes more sunlight and better ventilation inside buildings. Better building environment can produce better working efficiency and higher overall productivity.
  • 8. A wide selection of Colt Louvre color shades ensures that there are always be the right products and colors to meet any aesthetic and architectural specificity.
  • 9. The reusability of Colt Louvres is unprecedented. The product allows quick relocation as well as easy re-installation to new locations or completely transformation to satisfy other structural and functional purposes. It supports 1UL, 2UL and 3UL installation protocols.
  • 10. The detailed engineering support and comprehensive material specification data allow building architects and engineers to calculate the additional strength from Colt Louvre system in withstanding wind loads. Accurate calculation of wind loads enables precise detailing of needed structure strength and prevents overestimation of structural supports leading to unnecessary expense.