great work!!!!! that looks perfect! i havent had any heat problems,i just finished my summer grow a month ago, when it was 75 degrees room temp and i used a 37 cfm fan (1st pic) ive just finished a new box with a 65 cfm fan (2nd) that im about to use cuz my 8 northern light seeds just germinated.... so i dont think you'll need to switch fans... unless your from somewhere hot as hell

for some encouragement, heres a pic of the finished product...harvested last month from that exact growbox 69g's
PICT0416(1).JPGPICT0413(2).JPGharvest 3.JPG

__________________
~All threads , posts , and pics. posted by me here are all BULLSHIT and or totally fictional in nature .
I don't grow , nor do I suggest anyone else does due to the possability of serious legal reprocussion~