I dont think its too bad once the area is filled, one thing I didnt care for is you need to keep the ambient temps up around 90 deg's for it to be beneficial and if your C02 runs out for a few days while your out of town your going to have foxtails to deal with, and you will end up doing all the laundry on your own. 

I think If I were you I would buy a Louvered Dryer Vent Hood, thats how I pump the air out of my basement growing area. Leave the filter where you have it and pipe the air to the vent and put the fan between the filter and the vent