Whats up?

Is it possible to run an intake duct from upstairs or a cooler room?

Where are you venting your hoods? If you are venting them into the room that is your problem. If you vent your lights outside or into a different room then your temps should come way down.

Also im not sure because I dont use CO2 but from what ive read it enables the plants to tolerate heat better. Dont take that as gospel because Ive never used it but thats what ive read. Hopefully someone who uses CO2 can comment on that.
GetThisOrDie Reviewed by GetThisOrDie 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