How big before humidty problems?

[Richard_Dicosimo]

I am in the planning stages of a new tank and finally have the wife on board. I want to keep her on board. There will be no fishroom and that means no dedicated ventilation. I realize evap is directly related to surface area and to a degree lights used.

I am hoping for a 6'x24"x24'h tank
or even better would be a 6'x30"x24"h
OR EVEN Better 8'x30"x24"h but that is probably not in the cards.

am I going to have humidity problems from this tank? what do people who have large tanks do about humidity when they aren't able to directly exhaust outside?

I was planning on T5 MH combo. I don't know enough about LED to be confident in what I'm buying.

Thanks in advance!!