Coltlite CLS glass louvred ventilator

Coltlite CLS glass louvred ventilator

Colt International Ltd Third party certifications:
  • QA Certificate

    QA Certificate

    Certificate type

  • BSI Kitemark

    BSI Kitemark

    Certificate type

Natural louvred glazed ventilator, suitable for natural day-to-day ventilation and smoke control.

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For the highest aerodynamic performance where thermal insulation is not a key requirement. Non-thermally broken extruded aluminium 40 mm wide visible outer frames with frameless controllable, single glazed, overlapping glass louvres and concealed mechanisms. Louvres with either 8mm, 10 mm or 12 mm thick toughened, float or laminated glass. Overall frame depth 47mm, frame face width 40mm. Externally tested to and in compliance with BS EN 12101-2 as a smoke ventilator and CE marked. Externally tested to EN 14351-1, guaranteeing its performance as a façade element. Manufactured under the ISO 9001 quality and ISO 14001 environmental management standards.

General information

Uniclass 2015

Pr_70_65_04_56 Natural smoke and heat exhaust ventilatorsPrimary


H11/140 Louvres

L10/650 Metal louvres

Specification data - Natural smoke and heat exhaust ventilators

Product Reference

Coltlite CLS glass louvred ventilator

Louvre glazing



Float glass

Laminated glass

Toughened glass

Louvre dimensions

Louvre height 205–395 mm. Insert requirements.

Glass thickness

8 mm

10 mm

12 mm

Colour/ Finish

Polyester powder painted, RAL

Insert requirements; standard 60 µm.


Standard 20 µm.



24 V DC actuator

230 V AC actuator

Pneumatic cylinder

Standard product features


Non-thermally broken, 47 mm deep.

Product Options

Blade pitch:

200–390 mm (depending on overall size of complete unit) with central pivot point.


Fixing can be to curtain walling using 20–30 mm non-thermally broken glazing frame adaptor, or to structural opening using either through frame or strap fixings.


  • Frame mounted and painted motor (hidden behind side frame profile) positioned at top or bottom on either side of frame and with a typical operation time of 32 s.
  • Optional device to reduce force of closing louvres, to reduce the risk of finger squeezing (electric versions only).
  • If used as a smoke ventilator, activation is either by local thermal fuse which opens the unit at a pre-selected temperature (pneumatic version only), or by responding to an external release signal.

Its performance varies with size and options selected (tests to BS EN 12101-2 and BS EN 14351-1):

  • Aerodynamic coefficient: Up to 0.65.
  • Reliability: RE 1000 (10,000 cycles).
  • Wind load: up to 2000 N/m².
  • Snow load: SL 0.
  • Resistance to heat: B300.
  • Low ambient temperature operation: T(00) / T(-15).
  • Materials resistance to fire: E (to BS EN 13501-1).
  • U value: Up to 5.8 W/m²K.
  • Air permeability: Class 1 to BS EN 12207 – 10.4 m³/hr/m² or 1.6 m³/hr/m at 50 Pa.
  • Watertightness: Class 2A to BS EN 12208 – Watertight at static pressure of up to and including 100 Pa.
  • Sound insulation: 37 dB R’w.

Third party certifications
  • VdS: CE Mark / compliance with EN 12101-2: 2003. : Declaration of Performance according to EU-CPR-305/2011 referencing EC Certificate of Conformity No. 0336-CPR-89205540
  • FM00354 - Manufactured to ISO 9001:2008
  • HFB Engineering: CE Mark / compliance with EN 14351-1: 2006. : Test Certificate PZ 31100 2037/3/2012 according to EU-CPR-305/2011
  • DNV: 21654-2008-AE-GBR-UKAS - Manufactured to ISO 14001:2004
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