Glazed smoke vents in-situ in an office


The Estra is a stylish, thermally broken, louvred window ventilator. It can be used for for day-to-day ventilation and also for Smoke & Fire Release.

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Designed for use in vertical applications predominantly into glass structures it is ideally suited to commercial applications including shopping centres, office and atria.

Product Testing

Full independent product testing including opening mechanism, operational reliability, wind load, aerodynamic efficiency, mechanical integrity, environmental & fire performance all conforming & certified to EN 12101-2 specification.


It features single or double glazed louvre blades whose individual height is determined by the overall height of the unit (louvre blades are available in section heights from 100mm up to 300mm) with no need for unsightly filler sections, making the unit aesthetically pleasing and assisting aerodynamic performance.

Energy Conservation

All units have thermally broken frames.
Double glazed units have thermally broken louvre blade profiles and benefit from heat retaining seals.

Glazing Options

The Estra features a range of louvre blades, all of which vary in section height to suit the overall ventilator size.

    • 8mm single glazing
    • 10mm single glazing
    • 24mm double glazing (150mm to 300mm section height)
    • Opaque infil, aluminium alloy twin skin with thermal insulation



For smoke & heat release, and also for day-to-day environmental use if required.

Pneumatic Enables connection to Life Safety, Smoke Detection and Building Management Systems.

Electric Actuation Enables connection to Life Safety, Smoke Detection and Building Management Systems.

Aerodynamic Co-efficient

The unit has an aerodynamic co-efficient of 0.57


Made to Measure within the guidelines:

  • Minimum individual unit size – 400mm wide x 700mm high (min 3 blades high)
  • Maximum individual unit size – 1600mm wide x 3000mm high
  • Can be banked to form any total size to meet your requirements
  • Non-standard dimensions are available on request

Materials and Finishes

Manufactured using 6060 T6 aluminium alloy.
Can be supplied in natural mill finish or alternatively in a range of polyester powder paint finishes with a wide choice of colours and gloss levels.


The Estra ventilator is fitted as standard, with side, top and bottom 20mm wide glazing flanges ranging from 2mm to 30mm thick (can also be supplied without flanges, if required)


Maintenance should be carried out in accordance with McKenzie-Martin’s recommendations.

System Design & Product Selection

Assistance with scheme design and product selection is offered by our experienced technical team.



There are no drawings for this product.

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