Requires:

"canPrepareForNextRoom"
{
  "or": [
    "SpaceJump",
    "canWalljump"
  ]
}
{
  "heatFrames": 80
}
{
  "doorUnlockedAtNode": 1
}

Unlocks doors:

{"types":["super"],"requires":[]}
{"types":["missiles","powerbomb"],"requires":["never"]}

Dev note: This would technically clear A, but depending on what is being done here, there will likely be too much acid to cross the room.