Well ive got a grow box that needs a carbon filter. I made a DIY one from this site it works good. The only problem is that it raises the temps up to 84 to 86 degrees. its a 1 bedroom condo and I dont have the air being dumped out side just into the condo. And i leave the window open. But its a 6in canfan with passive intake consisting of 2 6 inch holes. So i guess is it bad to be using that carbon filter and not exhausting the air outside. And how can i cool this thing down. thanks in advance