Roof Opensky AOV Louvred Smoke & Natural Ventilator

Our AOV louvred smoke & natural ventilator perfect for comfort ventilation or as part of a SHEV (smoke and heat exhaust ventilation) system. The AOV Opensky is available in a range of dimensions, control operations and finishes making it suitable for a wide range of applications include both wall and roof.

  • Vent typeN-SHEV
  • tested toBSEN 12101-2:2003
  • Approved Doc B Free Area1.0m² & 1.5m²
  • Benefits


    • High free area performance
    • Meets 1.0m² and 1.5m² free area requirements
    • Opens within 60 seconds
    • Low maintenance & cost effective smoke vent
    • 6W/m2ºk U-value capability
    • Mill Finish or custom RAL colour
    • Tailored base to suit any sized opening
  • Features

    Blade Options

    The Opensky louvred smoke & natural ventilator can be manufactured with a variety of blade options. Translucent polycarbonate louvre blades provide excellent daylighting using a durable UV stabilised material, whilst also manufactured with insulated and un-insulated blades as standard. all blade options can be upgraded to de-mountable blades for easy access and servicing.

  • Features

    Control Options

    Rack and pinion drives have a slim, attractive aluminium housing of a robust, 30 x 30 mm square tube, into which the rack retracts. The cut-off switch and the motor gearbox unit are accommodated in a rounded, grey plastic housing attached at the side.

  • Features

    Custom sizing and free areas

    Stairwell automatic opening ventilators (AOV) are used in the stairwells of flats and office buildings where protecting the common escape routes is of paramount importance. The roof opensky can be manufactured in a range of sizes to match the required Approved Document B or geometric free areas.

  • Features

    Fire safety capability

    The Roof Opensky Automatic Opening Vent (AOV) Systems are integrated into a fire alarm system. As soon as the alarm is activated, the AOV automatically fully opens creating a “chimney effect”, which discards the existing smoke, therefore making it possible for people to find the exits and for Firefighters to extinguish the fire accordingly.

  • Features

    Installation ease

    Opensky is suitable for fixing in a wide variety of applications. The ventilator is supplied in two parts to facilitate easy installation on-site, the base assembly and the vent assembly. The base type options are either a turndown base for upstand mounting or flat base for roof sheet mounting.

  • Features

    Access hatch capability

    The Roof Opensky can also be supplied with a hinged base for use as an access hatch. The roof Opensky can be used as a staircase ventilator or roof-mounted lobby/corridor ventilator and to provide external roof access when required.


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How to Buy

As manufacturers only of N-SHEV ventilation equipment, our ventilation division can offer you product selection and application advice, or we can put you into contact with one of our ventilation design and installation partners who can provide you with a full turnkey package.

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Get product selection and application advice for your project, or If you know your requirements, we can give you a quote, typical free areas and provide you GA drawings to assist you with your project.

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Design & Installation

As manufacturers of N-SHEV ventilation equipment, we work in partnership with the UK’s leading ventilation specialists in the design, supply, installation and maintenance of N-SHEV systems.

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