ok, how big is your room. i currently have a room with five thousand watts, vertical lighting going. i use a two and a half ton ac to keep the temp down. this time of year i am only using four one thousand lights, for the simple reason i can pull outside air and keep the room low to mid eighties while flowering. dark time, room is around seventy. its hydro as well. i have one intake fan that is about a 200 cfm pulling air in from a window. the fan is attached to a blackout board and is about a foot from the window that is cracked open about three or four inches. if you stand next to the window outside you can hear it run. you can not hear it from any neighbors yard. the best way to set your room up, if you have a pitched roof. build a black box for your window. make it baffled with acoustical foam. make sure you leave full curtains and blinds on the window. this will look normal from the outside. install your fan on the inside. the fan will pull the air through your baffle and will cut the noise way down. on the exhaust side, cut a small hole in your ceiling where you can install an exhaust tube. put your exhaust motor, inside the attack. hang the motor from the trusses, will keep noise down. install a carbon filter inline or an ozone generator. put a y into your existing bathroom exhaust . i typically when not using ac, have double the size fan on the exhaust side, than i do on the intake side. keep in mind, i need low low fifty's to keep four lights cool in my room. if your outside temp gets above that your not going to keep the room cool. good luckimp: