He still has the vent in the bottom. If the a/c cannot supply enough air any extra can be pulled through the vent. Admittedly the vent might not be large enough.
You are correct. Also, a LOT of heat is in the garage. I taped up the vent on the garage side to keep from sucking the heat into the closet.
When standing in the closet, it is warm up high from my chest... up to the ceiling. If I kneel down, it feels comfortable. The box fans are pulling up the cool heat onto the rigs to cool them down from approximately [41 to 47 rig to rig depending on location] to [37 to 43 depending on location]. The 37 to 43 is with the door open as well.
I'm heading to Lowe's now to look for a large vent to install in the closet door. The goal is to get rid of the box fans to use less watts and have room to move around in their.
Be back after a while.