@invertedisdead - suppose we could be really picky, and say the conduction component is especially effective where it's actively heated by the vape, at the side walls
Screen at bottom of bowl -- not much conductivity there, and pacman screen or capsule lid on top of load is only relatively passive, lower temp conduction
I like to think of the pacman screen, or capsule lid, or liquid pad, on top of load as an insulating containment device -- keeps herb as a tighter puck, which offers better contact with hot side walls and doesn't let air flow bypass loosely packed herb with gaps (so nice not to worry about "spacers" with small Tafée Bowle pot loads
)
@vapviking - know you were talking about removing screen from wpa, and not the CU, but your post took me on a self search historical stroll through this thread. So many friggin choo posts about removing CU screen with capsules. And advice to "wipe" CU inlet after each session, OCD maxing out, avoiding sticky capsule lids
Saw this old pic on page 512, from 2018, and felt it needed another show (spent time arranging lids, gotta get more mileage from it)
If I'm repetitive and militant with my anti-screen capsule advice, my apologies. At least I'm not ranting to twist open CU with care