My personal take is that I'd never keep a snake (especially one that gets the size of a BP) in any sort of cage that's only 6.38 H...and by the time you
add substrate, it's even less. Minimal height IMO is 12" (depending on what you're keeping). Short cages encourage many snakes to push & rub noses.

The "hot hide" will have a doorway, of course, so the air should circulate adequately...though in cages with humid substrates you might get condensation
inside the hide. I have a couple hides that I drilled about 5 small air holes in (each), for when that was an issue, & re-using them with extra ventilation
makes no difference to their current occupants.