Filter Layers

If the Grill was used, add a layer of course filter material like the "universal washable air filter". Add some Polyester Quilting Batting and pore in some Activated Charcoal, spreading it out uniformly. Do not attempt to completely cover the area with charcoal. Add another layer of Batting. Repeat adding charcoal and batting layers until you have used up the charcoal. Took me about 4-6 layers.

Offered by Mike.