Hey Harddon you can make a carbon filter that takes the air out of the room from the side and returns it back to the room. No loss of airflow and it will still clean the air. Just a thought, that's what I do about odor. One Large Fart fan 5 16x24" filters and 6 pounds of active charcoal. One wood box and everything is inside the room clean and quit. cost me less then 100 bucks and lasts for 6 months then I just change out the coal and it's good to go again. Change out cost is about 30 bucks.