Yes I added a vent to the hood just to suck some heat and smell both from the light. Just cut the hole and used a flanged adaptor, then used flexable duct out to my 6" fan. The fan is mounted outside the room at the top and have a 6" pipe with louvered covers at the bottom for fresh air intake. I have 2 rooms set up 1 for flower and the other for veg and clones, they get about 4 1/2 foot tall with the bottoms trimed up. I get better results with 6 or 7 than with 8 or more. Hell it's all trial and error anyway.