Product review (3 stars): Captures GREASE only. Not smoke.
This is a GREASE filter, not a smoke filter. The aluminum catches the grease. It does exactly what it is supposed to do. Air King should make a charcoal filter to go with it that catches smoke. Broan does. I had to buy Broan charcoal filters and cut them to size, attach them to this thing to have a combination smoke AND grease filter.