ive looked at many ideas for homemede fume hoods, and a couple questions since they are old and not specific.
lets say someone were building a small ( 3'x3'x3') fume hood with a fairly low cfm fan and standard clothes dryer type exhaust ducting. what would be an effective, yet low maintanence odor absorber for it. ive seenkittylitter and fish tank activated charcoal, but which would need to be changed less often (since swij would have to build the filter himself). any design/material suggestions would be helpful.
p.s. about 25 cfm, 15' duct used to absorb acetone,zylene, hcl gas type fumes