The room formerly known as the Dirty Room. Now just the metal shop.
MIG, TIG, and stick welding equipment resides here. Associated safety equipment, such as auto-darkening hoods, coats, and gloves can be found here too. Bench grinders, hand grinders, and saws specific to metalwork live here.
There is a garage door in this room that can be opened for additional ventilation or outside access, but depending on the weather, it may be a good idea to close the door to the rest of the space before opening it.