How many filters are inside the Austin Air cleaner?
There are three filters. The first filter is a pre-filter (known as Permafilt ) which is a cotton cloth that lines the inside wall of the unit. The purpose of the pre-filter is to stop hair or large dust particles from clogging the HEPA filter. In the HealthMatethe main filter is comprised of two filter medium: activated granular carbon/zeolite mixture and True Medical HEPA paper. In the AllergyMachine there is the True Medical HEPA and the military carbon cloth filter known as HEGA.
