How do I test My Can 66 Carbon Filter to make sure im not getting a odor?

[EvilCartman]

Im using the filter in a 5 foot wide 7 foot tall by 9 foot long room. im running a 600 watt hps and a 400 watt hps with another fan pushing the heat out of the lights out of my grow room. the can filter and fan are connected together and forcing the air out of the room i have a switch hooked up to the fan and im running the fan at 70% my humidity is at 50% my air temp is at 73 degrees f and im getting a smell out of the filter when i tested it with cigarette smoke.

Could you elaborate a little more on this setup? You say you are using 2 fans? What type of reflectors for the lights? Are the lights seeing positive or negative pressure? Is there just one route for the airflow or are the lights and filter running separately?

Sorry for all the ?s, but I'm having trouble picturing it. It's a fairly small space, the 66 should be doing fine.