During the construction of Kadic, a construction worker named Leon Corbet died on the site. While it is unknown if he died in the Boiler Room, Sissi used this room 100 years later as a location for a seance to let Corbet rest in peace. She did this after finding out about it in a newspaper in the episode "Is Anybody Out There?".
Throughout Season 1, the Lyoko Warriors would often use the red door to access the sewers through a dirt tunnel. Later in the seasons it was used very rarely and in Fight to the Finish the red door was discovered closed for the first time.
Despite being a basement full of metal, cell phones work remarkably well in the Boiler Room; as shown by Mr. Delmas's call to Mrs. Hertz in "Cold War".
- The boiler room is confirmed to be actually haunted at the end of "Is Anybody Out There?", as a ghostly moan is heard, followed by the boiler room door closing on its own.
|Ice Sector | Desert Sector | Forest Sector | Mountain Sector | Carthage|
|Ice Replika | Desert Replika | Forest Replika | Mountain Replika | Volcano Replika | Carthage Replika|
|Other Virtual Worlds|
|Digital Sea | Cortex | Virtual Limbo | Simulation Bubble|
|Dormitory Building | Administrative Building | Cafeteria | Gym | Track | Park | Hermitage | Science Building | Playground | Garden Shed | Infirmary | Boiler Room|
|Union Base | New Mexico Research Facility | Space Station | Jungle Research Facility|
|Renault Auto Factory|
|Factory Floor | Factory Lift | Lab | Scanner Room | Supercomputer Room | Assembly Room | Security Center|
|Kadic Academy | The Sewer | The Factory | Ishiyama residence | The Pool|