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Old 06-12-2012, 10:31 PM   #3
retired trucker
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Join Date: 09-28-11
Location: Dallas, Georgia
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If you are using 3 3/4 inch intakes, then you only need one 2 inch exhaust.
Most use the 15 inch fire grill from a 221/2 inch webber for the fire basket, and use expanded metal from 8 to 12 inches high, and make sure it has about 3 inches of clearance from the bottom of the drum.

The lowest grate should be approximately 24 inches from the BOTTOM of the fire basket. If you are using a webber lid for it you can mount another grate above that. It usually comes out to be about 6 or 7 inches from the top lip of the barrel.

That is the tried and true design that works great. Some have modified this design, but for your first one I would recommend the above design.
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