animal plastics 1860/1960 rack question

im trying to find out how many holes and what size holes and also where i should put them into my 41qt sterilite tubs, i know a lot of factors will play into the final temps and humidity but im just looking for a starting point any ideas? T.I.A 05KAS05

You will want to put the holes mainly on the part(s) of the tubs that aren't being covered by the rack.

As for how many it is trial and error. It is different in every room. Remember that ît is easier to add holes than take away holes.