Meteor natural flap ventilator

Meteor MLS provides high performance extract ventilation for most kinds of industrial and commercial buildings. Tested to and in compliance with EN 12101-2.

Product information

Features and benefits

Wide range of applications - Meteor MLS is 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 - Meteor MLS has high aerodynamic, acoustic and thermal performance, and has a high resistance to the effects of fire.

Acoustic performance – Meteor MLS 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 - Meteor MLS 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 - Meteor MLS is manufactured from tough, corrosion resistant aluminium with stainless steel fixings.

Quality of manufacture - Meteor MLS is manufactured under the ISO 9000 quality standard.

We are at your service

We provide a pre-order design service. We also offer complete project management, installation, wiring and commissioning, which means that we take complete responsibility to ensure that the product is in full working order within one package of works.

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



Natural twin flap roof ventilator, suitable for natural day to day ventilation and smoke control, for high aerodynamic, acoustic and thermal performance. Tested to and in compliance with EN 12101-2.

Dimensions / size range

From 1000mm to 2500mm in width in 1mm increments

From 1000mm to 2500mm in length in 1mm increments.

Flap options

  • Single aluminium skin
  • Insulated double skin aluminium
  • Triple layer polycarbonate, either clear or opaque
  • Triple layer polycarbonate, either clear or opaque, with thermal break
  • Insulated double skin with reduced noise material to achieve R'w of 33 dB

Materials / base options

All components of the base and flap are manufactured from EN AW 6060-T66 aluminium alloy. Bases can be:

  • Single skin
  • Insulated double skin

Insulated double skin incorporating a thermal break

Colours / finishes options

  • Mill finish, standard
  • Polyester powder paint to a RAL colour, standard 75 mu

Fixing options

  • Fixing flange for curb
  • Fixing flange for roof sheeting
  • Fixing flange for glazing

Installation angle from 0 to 30° from the horizontal.

Controls options

  • Pneumatic (for smoke and day to day ventilation)
  • 24V DC linear drive electric (for smoke and day to day ventilation)

For pneumatic versions, either double-action locking mechanisms or failsafe open. For electric versions, only double-action locking option available.

If it is used as a smoke ventilator, activation is either by local thermal fuse which opens the unit at a pre-selected temperature, or by responding to an external release signal.



Performance of Meteor varies with the size and options selected. Most tests have been conducted in accordance with EN 12101-2. The exact performance attribute will depend on the chosen size, controls, and flap type.

Reliability class RE 1000 (1,000 plus 10,000 cycles for use as a day to day ventilator)
Wind load class WL 1500
Snow load class Up to SL 5000
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 From 1.07 to 2.9 W/m²K
Sound insulation Up to 33 dB R’w


Tested to and in compliance with EN 12101-2 and CE marked.

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