Bubbet To keep things fresh, maybe some sort of Fabricator, Creating material with energy. However, it works like a fire Extinguisher, and it can only repair a tile in front of the crew. So thus, they can only operate inside of corridor, though they can repair tiles outside of corridors, such as one piece of armour outside... But it cannot repair any other layers of armour, as crew cannot walk through armour. So, it would be a free, but limited, repair. Rooms being Repaired will only operate after being fully repaired after originally being destroyed.
As for healing RATE, Maybe around 50 HP per Second, or possibly 10 or 100. Also, Maybe after 10 Seconds of Usage, the Fabricator would need a Battery to continue. This idea has In game support if you don't think energy being converted into matter is already in the game, look no further than the ammo factories. 😉
