Cleanroom

This room must be clean.

Good info on this page

https://www.reddit.com/r/feedthebeast/comments/6v8egi/some_observations_on_gregtech_cleanrooms/

Tips
Place a maintenance hatch cover on the controller and attach it to a light or alarm. For each maintenance needed, the chance of voiding is increased by 10% (3 repairs needed, 30% chance to void). Because the cleanroom operates continuously, maintenance needs will occur over time. Later upgrade to an auto-maintenance hatch.

Place signs over the machine hulls to remind that they must be upgraded when changing voltage levels. They can easily be forgotten and cause an explosion destroying the clean room.