Meteor MLS Natural Twin Flap Ventilator


Natural twin flap roof ventilator, suitable for natural day to day ventilation and smoke control, for high aerodynamic, acoustic, airtightness and thermal performance. Tested to and in compliance with EN 12101-2 and CE marked. Manufactured under the ISO 9001 quality standard.

Features and benefits:

  • Wide range of applications - classed as a dual purpose ventilator, providing both day to day and smoke control ventilation. A polycarbonate version allows the entry of natural daylight, and an aluminium infill panel is available, with the option of additional acoustic attenuation.
  • Pneumatic or electric linear drives are available.
  • High performance - high aerodynamic, acoustic and thermal performance, and a high resistance to the effects of fire.
  • Acoustic performance – offers the option of a reduced noise panel with a performance of up to 33 dB R’w.
  • Thermal performance – As an option, the base of Meteor MLS can be thermally broken to reduce air leakage and increase insulation.
  • Proven performance - Meteor MLS has been exhaustively tested and certified to EN 12101-2: 2003 in accredited third party test laboratories and is CE marked.
  • Easy to install - may be installed into glazing, onto a curb or into sheeting. It has a wide range of base profiles to suit most glazing, sheeting or curb types.
  • Durable - manufactured from tough, corrosion resistant aluminium with stainless steel fixings.
  • Quality of manufacture - Meteor MLS is manufactured under the ISO 9000 quality standard.

General information

Uniclass 2015

Pr_70_65_04_56 Natural smoke and heat exhaust ventilatorsPrimary


L10/490 Roof ventilators

Specification data - Natural smoke and heat exhaust ventilators

Product Reference

Meteor MLS natural twin flap ventilator




Single skin

Insulated double skin

Insulated double skin incorporating a thermal break


Single aluminium skin

Insulated double skin aluminium

Triple layer polycarbonate, clear

Triple layer polycarbonate, opaque

Triple layer polycarbonate, clear with thermal breaks

Triple layer polycarbonate, opaque with thermal breaks

Insulated double skin with reduced noise material

To achieve R’w of 33 dB.

Aluminium finish


Polyester powder coating

Insert colour requirement.



24V DC linear drive electric

Standard product features


Meteor MLS is manufactured from tough, corrosion resistant aluminium with stainless steel fixings. The frames of both the base and flap can be insulated and thermally broken.


Varies with the size and options selected. Most tests to EN 12101-2.


RE 1000 (10,000 cycles).

Wind load:

Up to 1500 N/m².

Snow load:

Up to 5000 N/m².

Resistance to heat:

B 300.

Low ambient temperature operation:

T(00) to T(-15).

Materials resistance to fire:

E (to EN 13501-1).

U value:

Up to 1.07 W/m²K.

Sound insulation:

Up to 33 dB R’w.

Product Options


  • Throat widths: 1000 mm to 2500 mm.
  • Throat lengths: 1000 mm to 2500 mm.

Flap glazing:

The following glass and polycarbonate options are available:


  • Laminated glass: 6 mm, 10 mm, 16 mm, 25 mm, 32 mm.
  • Toughened glass: 6 mm, 10 mm, 16 mm, 25 mm, 32 mm.


  • Twin wall: 10 mm clear and opaque
  • Triple wall: 16 mm clear and opaque.
  • 5-wall: 25 mm clear and opaque.


Electric failsafe open or close. Failsafe open versions are fitted with a back-up fusible link to open the vent at a pre-defined temperature, irrespective of the control mode.

Guards and accessories:

Various guards and accessories are available to suit particular applications.


Third party certifications

  • TÜV Rheinland: CE Mark / compliance with EN 12101-2. : Declaration of Performance according to EU-CPR-305/2011 referencing EC Certificate of Conformity No. 0336-CPD-10859
  • Kiwa: KSC-K80293/01 - Manufactured to ISO 9001:2008

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