Activated Carbon Air Filter : 4 Steps Instructables
Computer fan Activated Carbon Glue Window screen pantyhose Modeler''s plywood Basswood or balsa 12 volt AC/DC converter If you have enough modeler''s plywood, then you can make the frame out of that, but to save money, I chose to glue my frame together with some balsa wood I had. I had everything but the activated carbon, which you can purchase at pet stores, already at my house.