AirPura whole house Tar-Barrier Pre-Filter 6-pack is AirPura special pre-filter replacement.
The Tar-barrier pre-filter is used in AirPura T600W and T600DLXW whole house air purifiers to trap tars in cigarette and tobacco smoke.
The Tar-barrier pre-filter has an effective surface area of 570 sq. in. and covers the entire inner surface of the polluted air intake.
The tar-barrier pre-filter's lifetime - 3 - 4 months (depends on the usage and the smoking habit).