White Large Pre-Filter - Austin Air Healthmate BB850AD The pieces assemble by friction

The pieces assemble by friction fit for a straightforward setup

shuts off intermittently

Confirm your connection size before ordering so the kit fits your system

helping to enclose and seal the bag area during operation

Because it meets furniture legs and walls during cleaning

White Large Pre-Filter - Austin Air Healthmate BB850AD The pieces assemble by frictionThis replacement white pre filter fits the Austin Air HealthMate air purifier. It serves as the first filtration stage, trapping larger dust and lint before air reaches the carbon and HEPA media deeper in the unit. Because it catches the coarsest debris, the pre filter saturates faster than the stages behind it, and a clogged one restricts airflow and pushes particles onto the main filter. Air delivery falls and the expensive media wears out sooner.