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The F7 sock filter DIY installation is for inlets up to 230mm.

This filter is made from internationally rated F7 filter material. With the upgraded filtration a much larger surface area is required in order to let the air pass through the filter, it uses a cylindrical design to maximise surface area.

A smaller surface area will reduce airflow and increase fan noise, this will then cause a reduction in the life of your fan motor.

The filter should be replaced every 12 months


  • Read and follow the maintenance instructions in the Operating Guidelines of your unit.

    Step 1: Ensure fan is switched off

    Step 2: Remove old filter

    Step 3: Remove frame from old filter if it has one.

    Step 4: Insert frame into new filter

    Step 5: Pull ties tight and tie in knot, to secure new filter to inlet.

    Replace filter every twelve months.

  • If for any reason the item is does not fit,is damaged or we have supplied an incorrect item we will offer a replacement at no extra charge or full refund including the shipping costs, at our discretion.We may ask that the filter be returned to us for examination or resale but will pay the return shipping costs.If a customer has ordered an incorrect item or reconsidered their purchase we will refund the cost of the filter less any shipping cost upon the receipt of the item in a saleable condition

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