More Temp issues

Okay so I'm running into some un expected problems. My grow box, is sitting at usually 89-92f. This is pretty high, and just having dropped the seeds, I'm worried. I have an intake and exhaust fan running (computer fan). The only thing I can think of is that the exhaust is running through a homemade charcoal filter, and it may not be powerful enough to push the air through? I'm really at a loss here guys, I would REALLY appreciate some input here.

ill will agree with your suspicions, that fan probably isnt pushing out as much air as needed. options: get a stronger fan. get more exhaust fans. have better circulation or cold air intake,...im assuming your soil right? bc if not your going to have serious res issues as well....first remove that filter and see if ur temps drop. then ull know the source of your problem.

i wish i had those temps....

What do you mean? I'm assuming your in california, what kind of temps are your plants looking at?