These units have been Focus group tested and have been proven to be operable without prior knowledge or tools. Various forms of the Reverse Retrofit are available. Selection is dependent upon the distance of the Frame from the Sash. Please see drawing above for further information. Simply Measure this distance and choose the model from the table below.
This type of Angel Ventlock can be Factory Fitted or used as an Aftermarket Device. Particularly useful on Vinyl and single hung windows where there is insufficient room on the top sash to install any of the versions listed.
IMPORTANT: Window manufacturing and device fitting is subject to tolerances beyond our control. For this reason, the dimensions shown in the table below are given for guidance only. It is the responsibility of the window manufacturer and/or installer to ensure that the correct product is specified and fitted. The installer must confirm that the device operates and resets correctly otherwise the safety features provided by this product will not work . If the device does not reset correctly it will not comply with ASTM F2090-2008, 2010 and 2017 regulations and will not be fit for purpose.
Select your window frame to sash clearance on the slider below to identify your requirements.