I'm running one 1000w light and temp is 90..I wanna add another light so I'm going to buy a new 8" exhaust fan that's 700cfm..my current ones a 260. So I'm wondering how I would hook it up to the hood and exhaust it outside.. I just don't get it lol.. From what I've read it won't work can someone elaborate please.. Right now its sucking through filter and blowing outside .. How can I have it suck from the hood as well as go through the filter and outside?