Do you live somewhere colder where you could use an intake line to bring in colder outside air? If not you might want to invest in a small but low priced a.c unit..especially if you're growing somewhere that has a typically hot summer. The only negative to an ac is the power bill.
Regardless of ac or not I would definitely have one intake fan coming in on a bottom port, and have some fans constantly moving the air around.
I bought a laser temp gun off Amazon awhile back and it's been very helpful at checking the leaf surface temp, you might want to consider picking up one of those too.
Try a few different things and find what works for you.👍