These are G4 odour removing sock filters. DIY installation pack for inlets up to 250mm. The pack includes the Filter Specialists replacement filter, ties for securing the new filter and easy to follow DIY instructions. This filter is made from internationally rated G4 odour removing material to prevent odours being introduced to your home from the roof space or outside. The life of the filter depends on how bad the smell is and how much air passes through your system. This can also be a upgrade to your HRV system it will fit on the circular inlet in the top of your HRV system. This can also fit onto your Smart Vent System.

DIY INSTILLATION INSTRUCTIONS FOR DVS FILTER Read and follow the maintenance instructions in the Operating Guidelines of your unit. Step 1: Ensure fan is switched off Step 2: Remove cable ties from inlet Step 3: Remove frame from old filter Step 4: Insert frame into new filter Step 5: Join cable ties provided, end on end, to secure new filter to inlet. Replace filter every six to twelve months.