(3E22) ANDREAE FILTERS USE ANOTHER PRINCIPLE: INERTIA SEPARATION. PARTICLES BY THEIR MASS ARE THEN EJECTED OUT OF THE AIR FLOW DURING CHANGES OF DIRECTION. ADVANTAGES: NO FACE-LOADING, BETTER AIRFLOW INTO PAINT BOOTH, GIVING A HOLDING CAPACITY 3 TO 5 TIMES HIGHER THAN MOST COMMON MESH FILTER, TAKE UP LESS SPACE FOR STORAGE.