How much air circulation for dry room

I'm going to harvest some plants in a day or so and I plan on drying them in 2x2x4 tent. I would like to know how much air circulation I should have inside the tent. I was planning on taking some ducting and connect it to my grow tent to my dry tent. My grow tent has negative air pressure so I was hoping that it would exhaust the air in my dry tent also.
My exhaust fan is a 745 cfm, so it has more than enough power to exhaust.

Let me know what techniques I can use to dry in my tent.

That size fan might be overkill depending on the size of your harvest. Just make sure you keep an eye on humidity levels in your dry tent. You wanna keep the humidity at around 40-50% for optimal drying in my opinion. You don't need a very large fan for cannabis to dry as long as the humidity levels are proper.