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The Kiln Room is a room inside of the Old Clockworks in Luigi's Mansion: Dark Moon. The Kiln Room is accessed by taking the third or fourth doors on the left inside of the Transportation Hall. The main feature of this room is the large kiln in the middle. There are. Several pipes run through this room and occasionally release steam. There's a vent here that can be pulled open to release a gold Robomb. The two doors on the right lead back into the Transportation Hall.
During Roundhouse Brawl, Luigi has to go through the Kiln Room to reach the end of the Transportation Hall. When Luigi enters the Kiln Room, both of the pipes in the room are releasing a lot of steam. This steam does not allow Luigi to use the Strobulb. In order to get rid of the steam, Luigi needs to turn the left valve until it is off. The right valve is missing, but it can be revealed with the Dark-Light Device. After both valves are turned off, Luigi needs to either vacuum or blow the steam away with the Poltergust 5000. When Luigi activated the Strobulb light on the machine, he is attacked by two Greenies. After the Greenies have been defeated, this mission's Boo automatically appears as well. During Play Catch, a Polterpup can be found here, but it runs off.