so like i said wat if i will hand it inside in corner duck outside to fan and fan to hood and hood duck to exit ....so clean cold air will be pushed outside tent .....just an ideaAirwalker16 meant that warm air kills the filter quicker.
However If your hood isn't 100% airtight then it does no good to put the filter before the hood. My cool tube is awesome but when I added anot her light with a standard glass lense, it picked up smell..
Pulling is more efficient but if you pull air through your hood and out the tent to your fan and from the fan as directly and short as possible, pushing into your filter won't be a problem