I had to even move my dehumidifier out of the same area as the grow because of the heat they kick off.. One of the few drawbacks to using a dehumidifier over an AC, however I feel like my temps haven't been an issue since I moved everything into its own room.. I only end up needing it in late Spring to mid-Fall.. Then, it gets TOO dry in my basement!!! I saw RH in the teens and the plants weren't happy!!
Another thing you can get are the passive moisture absorption buckets.. I'm pretty sure it's just a big plastic tub filled w/ silica beads or something along those lines, and you put one or 2 in the basement and it wicks the moisture out of the air.. I've never used one, but I bet it wouldn't hurt your situation!!!