Requires:

"h_canNavigateHeatRooms"
{
  "heatFrames": 90
}
{
  "or": [
    {
      "obstaclesCleared": [
        "B"
      ]
    },
    {
      "and": [
        "ScrewAttack",
        {
          "or": [
            "canPrepareForNextRoom",
            {
              "heatFrames": 30
            }
          ]
        }
      ]
    }
  ]
}

Clears obstacles: B