thx for all your help.my? is where can i find the 38 special filter checked marnardes they had no clue on what i was talking about.as you no i'm new to in/out take with air flow is the exhust fan a duct fan and if so i saw 1 cfm was 70 is that good enoguh?about out-take fan was wondering would a honeywell house fan ran all day do the same as the out-take fan. just looked up can and priced some can filters the 33 is a little $$ saw a few others that were a little cheaper was wondering would they work or would some other type of carbon filter work saw some at hardwear store just want to no what you think.and if you have any more suggestings please drop your knowledge on me.free tokers of da world