G4 Sock Filter
The G4 sock filter DIY installation pack for inlets up to 250mm. The 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 most positive pressure ventilation systems. The filter is designed to perform in the same way as your existing filter with a large enough surface area to maximise airflow and minimise fan noise.
The filter should be replaced every 12 months.