i use upper entrances 40 acre, in very hot and humid temps here, i will tip the outer cover back, or add a vent box. spacers work and would be great too. temps: i do this if we are in the 90's (hot and humid) for an extended period of time. it doesn't hurt. just remember to make sure your outer cover/s are either strapped down, or with heavy weight on them. today we received a nasty storm with high winds and i almost went sailing off the deck with the umbrella from the deck furniture..........
smacked a window, tore the screen, banged the siding and carried me for a few feet before i went airborne, but the outer covers on the hives with the weight on were just fine.........
guess i need a new base for my umbrella.........