CarboAir 100 Pre-FiltersCarboAir Pre Filters are ultra efficient at removing dust particles. The women fibres are thicker but less dense than competing brands, meaning airflow is less restricted without compromising on the pre filters particle capturing ability. CarboAir Pro 60, 50 and 100 Filters come with a pre filter as standard. This range of pre filters are also sold separately and can be used with other filter brands. The life of the pre filter depends on the