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Coltlite natural louvred ventilator

Coltlite is a natural louvred ventilator suitable for natural day-to-day building ventilation, as well as smoke control. Most variants conform to both EN 12101-2 as smoke ventilators and EN 14351-1 as natural ventilators. All products are CE marked. It can provide inlet and extract ventilation as well as the entry of natural daylight for most kinds of industrial and commercial buildings. It achieves high acoustic, thermal and aerodynamic performance. It is suited for installation into the façade.

Coltlite CLS 45

Coltlite CLS 45 natural louvred ventilator, fitted with chamfered / bevelled glass, suitable for natural day to day ventilation.

Detailed Description

Non-thermally broken extruded aluminium outer frames. Frameless single glazed controllable louvres, closing flush, with either 8mm, 10 mm or 12 mm thick toughened bevelled glass. Overall frame depth 47mm, frame face width 40mm. For installation in the vertical only. Not tested or certified for smoke control ventilation.

Dimensions / size range

From 300mm to 1600mm in width, and from 300mm to 3000mm in height as one module.


Non-thermally broken, 47mm deep


8mm / 10mm / 12mm overall clear bevelled toughened glass.

Blade Pitch

170 - 350mm (depending on overall size of complete unit) with central pivot point.

Colours/ finishes options

  • Polyester powder paint to a RAL colour, standard 60 mµ
  • Anodised, standard 20 mµ

Fixing options

  • Fixing to curtain walling using separate adaptor
  • Fixing to structural opening using either through frame or strap fixings.

Controls options

  • Lever
  • 230 volt AC actuator
  • 24 volt DC actuator

The positioning of the frame-mounted actuator (hidden behind side frame profile) depends on the type of actuator selected. It is installed on either side frame (on the left or right) and with a typical operation time of 20-60 seconds. With electric versions there is an optional device to reduce the speed and force of the closing louvres in order to reduce the risk of finger trapping.


The following performance attributes follow tests to EN 14351-1:2006 (standard for windows and doors). The exact performance attribute will depend on the chosen size, controls, and louvre type.

  • Air permeability: class 2
  • Water tightness: class 2A
  • Resistance to wind: class B4


Tested to EN 14351-1:2006

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

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