First thanks to everyone for the replies. Ok I think I am going to attempt an intake. how i have it set now is the carbon filter is on one side of the room, from that comes out ducting then i have a Y splitter for the ducting that goes from one 8" and splits into two 6" for the light hoods. then goes across and the two sets of two lights are connected and the ducting continues to another Y connector that converts my two 6" runs into a single 8" again then that connects to my exhaust fan. I did throw that term sealed room out there loosly because my room has no intake vents an i put in hella work makin sure every inch was sealed up. I will see whats up on some pics when the lights come back on tonight. need to do some adjustments anyways. got that co2 burner runnin last night and that dude puts on a serious show with some serious heat. i'm considering an a/c if the heat doesn't go down. but i think the fan is good, it moves a whole lot of air for sure with no signs of struggle or anything. you can see there is some sort of pressure in the room though because my white reflective pvc plastic stuff is ballooning out. updates to come. Thanks again for the help.
juggaloscrub Reviewed by juggaloscrub on . add a little more fan maybe? Ok here goes, my first grow. I am running in my flower room which is 9'x11'x7' 4x 600w hps lights all with vented reflectors. They are connected with flexible aluminum ducting. I was looking at the sticky where it shows the calculations for configuring your cfm and I'm not sure my 746, i think, Can Fan 8" HO fan is doing the trick. I have a couple of 90 degree angles and with that formula it says i need 1320 or so cfm to maintain appropriate venting. I am having a little heat trouble, staying Rating: 5