AirPura T400 / T400DLX Tar-Barrier Pre-Filter 6-pack is AirPura original replacement pre-filter.
The Tar-barrier pre-filter is a 1-inch thick special pre-filter media featuring improved ability to trap sticky tars in cigar and cigarette smoke.
Tar-barrier pre-filter is is the first stage of the air filtration system used in AirPura T400, T400DLX air purifiers to trap tars and protect the air filtration system from fast contamination.
The Tar-trapping pre-filter has an effective surface area of 300 sq. in. and covers the entire internal surface of the polluted air intake (lower deck of the unit).
The pre-filter has to be replaced with new one once it gets very dirty or clogged.
The vacuuming is not recommended.
The tar-barrier pre-filter's lifetime - 3 - 4 months (depends on the usage and the smoking habit).
Tar-barrier replacement pre-filter comes in packs of 6 filters.