yes and no
if u are doing 2 tents u can use a inch fan as the ejection fan.......split the feed with a 8 inch to 6 inch Wye connection (i mean this is directly on the fan housing itself) .....going on 5x5x6 tents (can go 10 or 12 if u are talking larger but not sure if they make reducers to 6 inch from those
now the ducting needs to be same lenght and u hook on hood then u can do carbon filters .....keep everything the same as much as u can to evenly spilt it
now to make u feel 300% safe and happy
http://www.amazon.com/-Line-Duct-Ozonator-Corona-Discharge/dp/B00062KQ3I
add that mid point in the ducting for the ejection point .........if anything gets by the filter the ozone kills the smell .......your ejection point will smell like hospital air