Mountain Breeze - Pre Filter & HEPA Filter Accessory Pack (model 12746SP1)

The pre-filter is coated in an anti-bacterial agent, to prevent bacterial growth on its surface.  The pre-filter traps larger particles to prolong the life of the other filters & is easily cleaned with the household vacuum, extending the life of it in the short term.  The H11/12 class True HEPA Filter traps up to 99.7% of particles greater than 0.3 microns.  The filter is completely sealed in the frame, ensuring you receive maximum protection agains dust mites, pollen, mould sports and other nasties. Depending on the environment that the air purifier is being used in, both of these filters will last around 12 months.