Ok. First time grower here. So I have a tent in my coal room in the basement and I am using passive intake and have my current exhaust as follows. Fan===duct===air cooled hood===duct to outside the tent. My plants are 3 weeks old and I have a strong smell as soon as I open the door to the room, not the tent door. My girlfriend can sometimes smell it when she opens the door to the basement from the kitchen. My carbon filter will be here tomorrow and I plan on installing a second inline fan int he same duct to help with airflow. My question is should I keep the filter in the tent with the 2 fans next then the hood? Or filter,fan,hood,fan, duct to outside the tent. The coal room has no air circulation other than a tower fan I put to blow along the ceiling and there is still moisture. I plan on venting the exhaust through a hole in the wall to the garage. Should I put the carbon filter inside or outside the tent. If I put it in the tent I plan on sealing my air cooled hood to prevent the smell from bypassing the filter and stinking the room up. I can't have any smell since my kids play video games in the basement. The 6" fans are rated at 240cfm and it's a 36x20x62 tent and I have negative pressure but once the filter is on I feel 2 fans would be best for airflow and temps. I am open to suggestions and can upload pics if needed. Thanks