I'm building an incubator from an old explosives crate (no worries, it's been clean for a long time!) and I'm not sure where to put the vent holes, or how many to use. I live in a fairly warm often humid climate (the current temp is 82 with the humidity at 71%), could I get some ideas? https://www.backyardchickens.com/a/high-explosives-incubator This is the page for it. I'll have a heat sink and a water basin in it as well. Any help would be appreciated!