Single & Twin Flap Skyvent

The Powrmatic Single & Twin Flap Skyvent is an eye-catching, high quality single and twin flap ventilator. Its low profile design offers the ideal solution for modern industrial and commercial buildings. The unit features extremely low air permeability which is a significant help when designing systems to meet the challenging air leakage rate detailed in new Building Regulations.

  • TESTED TOBS-7346 Part 1: 1990
  • Tested u-value as low as0.17W/m² °k
  • Benefits


    • High aerodynamic, acoustic and thermal performance
    • Glazing & façade system integration
    • Opens within 60 seconds
    • Dual functionality for smoke and day-to-day ventilation
    • Low profile design
    • Pre-assembled units for easy installation
    • Custom RAL/BS colour options
  • Features

    Flap Options

    Uninsulated aluminium
    Insulated aluminium
    Flaps can be acoustically insulated to give a weighted noise reduction of Rw 38dB.

  • Features

    Base Types & Installation

    The Single & Twin Flap Skyvent 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 louvre box assembly. The base types and applications are as follows:

    • Turndown Base - mounting onto weathered roof upstand
    • Flat Base - mounting directly onto roof sheeting
    • Glazing Base - integrating into glazing systems

    Single flap Skyvents can be supplied with the operation located in the cill of the vent and with no centre section-making it ideal for use as an access hatch.

  • Features


    The Skyvent has been tested to BS 7346 – Part 1: 1990: Specification for natural and heat exhaust ventilators. When closed the ventilator is weatherproof and is tested to BS 5368 Parts 1 & 2. BS 7346 is now superseded by EN 12101.

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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