1000w 4x4 ventilation..

Ive heard many things, but is a 200CFM fan really enough to keep temps cool enough with 1k watt and pulling thru a carbon filter? thanks in advance!

no I have a 400 watt that is too warm for my tent and I have that size fan. It may be I am using too small (4 inch) ducting. But I can't get her below 95 with the light on and fans ablowin' So, don't jump over a 5 dollar bill to save a nickel, but go for overkill on the cooling. Imho..................lol

Nope..get a big one.

Depends where your intake is coming from. If its cold outside air then its possible. I'm currently cooling my 4x4 with a single inline fan pulling thru a carbon filter and cool tube. It's not much bigger than 200cfm. My high temps run steady at 78.

I have a 375 cfm fan in my tent it's a 4x4 I have temps of 75- 78 all combined with a 400 watt hps

no I have a 400 watt that is too warm for my tent and I have that size fan.