How Hot is too Hot?

Get a fan at the bottom of your grow area (mines a closet so this works well) and have it sucking fresh air from outside and blowing it inside. then at the top get an opening or even another fan($$) and have it sucking the hot air out of the top (heat rises) mines at like 75-79 and its goin well.

can't get mine below 88 during lights on just they way it has to be

my temperatures vary a lot, between 66 and 91. I've got an expensive airflow system and it doesn't seem to matter, I run the lights at night, have the fans on 24/7, I have intake fans, vortex fans, you name it, once the sun comes out the temp goes up. But on the bright side I haven't noticed any problems with the plants.

I've often thought about getting an intake fan for my tent but I'm worried about sucking bugs in. Is this an issue.? Or are there filters you can buy for that?
My tent gets up to around 85F.

I use a standard bug screen, something like $0.75/foot at the local hardware store, i just put it across the opening and put the ducting over top of it, duct tape as well of course. No issues with bugs.

they can (and some say enjoy) the harsh weather patterns. like their watering system, they love lots of water then keep it dry for a day befpre watering it etc.