Defender Restricted

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The Defender Restricted designed specifically for resident safety.


  • Built-in quick release lever allows the window to be fully opened for easy cleaning, total ventilation.
  • Handed 'profiled' vent arm further enhancing weather seal 
  • Extended enclosed end cap to enhance weather sealing 
  • Built-in mechanism limits initial opening 
  • Restrictor automatically relocates and resets when the window is closed 
  • Available in 12" to 24" top hung and 12" and 16" side hung 
  • Unique patented robust cam friction device eliminates any risk of friction screw misuse 
  • Avaliable in ferritic and austenitic stainless steel for enhanced corrosion resistance 
  • Drill jigs for all sizes are avaliable to order 
  • Slot hole slot format will provide the ability to adjust the vent easily
  • High carrying capacity of 20" and 24" top hung hinges avaliable


  • Capable of complying with BS 6375-2 and EN 13126-5
  • 10 or 12 year guarantee dependant on material selection (details available upon request) 
  • Standard ferritic (was 430) steel tested to BS EN 10088-2 Grade 1.4016 
  • Austenitic (was 304) stainless steel tested to BS EN 10088-2 Grade 1 1.4301 for enhanced corrosion resistance