The ultimate Sash Window Safety Restrictor

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About Angel Ventlock®

We pass the ASTM and Secure by Design tests

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Angel Ventlock® Safety

Our Patented, tried and tested unique design

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About The Angel Ventlock®

Incorporate WOCDs into your commercial offering

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Angel Ventlock® Commercial





Meet Angel Ventlock® child safety window restrictors

Child safety window restrictors that are fully compliant with ASTM F2090-2008, 2010 and 2017

Meeting the Highest Standards

Complies with ASTM F2090-2008, 2010 and 2017 regulations, meets appropriate British Standards & is recognised by the Police Secured By Design initiative

Clever Patented Design

Designed by Sash Window Experts Mighton in Cambridge


Tested to ASTM F2090-2008, 2010 and 2017, appropriate British Standards & Secured By Design


Resets automatically when the sash is closed. Non-locking versions are safe for Egress windows


Approved by police forces to improve the security of windows


Suitable for new or existing Timber, PVCu or Aluminum Sash windows

Fitted in minutes

Factory-Fit and retrofittable options available

By restricting the opening of your double hung window, Angel Ventlock® allows for ventilation whilst making it difficult for children to open the window. For adults however, it is simple to use and the window can be easily opened and the device reset by following the steps below. Fully compliant with ASTM F2090-2008, 2010 and 2017.

How does Angel Ventlock® work?


When you open the window, the sash will stop when opened to 100mm


Simply press to release (repeat on opposite side for single action devices)


The sash window can then be easily raised fully – no key required


When you close the sash, the device automatically resets and arms itself.

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