Originally Posted by uproot

I doubt im going to read 14 pages in this thread im only on page 4 but how about just packing the carbon in a womans nylon. It will allow you to pack it tight inside the duct or tubing so that the carbon doesn't "settle" it will sit in circular form as air blows through it?

Originally Posted by panhead

Here is a way to make carbon filters for less than $3 each,they take about 30 minutes to make & all components & materials can be bought at any meijers store.

Materials needed.

1 4 pack Scotch Brite cloth towels from Meijers............$2

1 Bottle Activated Carbon from Meijers or fish store......$6

1 sewing needle & thread from Meijers........................$2

Total cost for 4 carbon filters...................................$10.

First you start out with the Scotch Brite cloth,its very thin & extremely strong,i find it much stronger than aluminum window screen material,its next to mpossible to tear yet the weave of the material is such that it will not restrict air flow.

Take the Scotch Brite & fold it in half or to a smaller size to fit your needs,like this.



Then take & sew 3 & 1/2 sides of the Scotch Brite closed making a pillow case looking thing,make sure to leave a few inches open to fill the "pillow case",then pour in the Activated Carbod to a little less than half way full & sew up the spot that was left open to pour the carbon in.

Here is the carbon.



Here are 2 finished Carbon Filters.



As for attaching them to what you need to there are several options,there is always duct tape in a pinch but i connect mine using hose clamps from the hardware store,the hose clamps make it easy to take the filter off if needed & is more secure that tape.

These work every bit as good as a $80 carbon filter i bought off of ebay & cost less than $3 each & about 2 hours time to make 4 of them,its not getting any cheaper than that.