The G4 sock filter is no longer available and the upgrade to the F7 is suggested. As always, please check with your manufacturer to ensure compatibility and continued warranty as applicable.

The G4 sock filter DIY installation pack includes the “Ventsure” replacement filter, ties for securing the new filter and easy to follow DIY instructions.

This filter is made from internationally rated G4 filter material and is the standard filter option for a large number of positive pressure ventilation systems.

The filter is suitable for any ventilation system with an inlet up to 200mm in diameter.

The filter should be replaced every 12 months.