Here are my two drying boxes (they're only next to each other for the picture). I drill 1" holes across the bottom right and top left, and then I aim a small oscillating fan at the lower holes and the air vents out of the top. You can see the holes on the box on the right:
When the buds first go in I keep the fan on high and don't have it move. As the moisture level drops I lower the speed and have it oscillate to make sure they don't dry too quickly. If it's really dry where you are you can cover some of the holes or turn off the fan for some part of the day.
Here is a diagram of airflow I did after my first harvest:
The newspaper was there to deflect airflow, but I don't bother with that any more. Ignore the cup of water...that was just to keep the RH up to slow down the drying!
When the buds first go in I keep the fan on high and don't have it move. As the moisture level drops I lower the speed and have it oscillate to make sure they don't dry too quickly. If it's really dry where you are you can cover some of the holes or turn off the fan for some part of the day.
Here is a diagram of airflow I did after my first harvest:
The newspaper was there to deflect airflow, but I don't bother with that any more. Ignore the cup of water...that was just to keep the RH up to slow down the drying!