ok so i have an intake fan pushing 170cfm an was going to get a exhaust fan but the closet one that will fit pushes 235cfm, is that ok or safe to do? or will it put to much stress on the fans? i can get a intake that is 210cfm but will cost me alot more money because i already have the 170cfm fan. i read some where that its good to have your exhaust fan moving more air then your intake fan but there is a big difference. oh an my grow room is by no means sealed there are cracks in a few places that air could get in. but if i have to i will get the 210cfm fan for saftey