Wiktionary
machine room
n. 1 A limited-access room in a larger building dedicated to HVAC equipment and other machinery. 2 A dedicated room for computers and related data processing equipment, often having a raised floor, abundant and dedicated air conditioning, and specialized power supply and fire suppression systems.
Usage examples of "machine room".
Leoh sat in his office behind the dueling machine room, staring at the now blank view screen.
Both the kitchen and the machine room were bright with the light that flooded through the translucent walls.
With different keys he locked the lumber shed, the plywood shed, the machine room, and the office where the varnishes and frames, the saw blades and the cakes of bone glue were kept, left the yard, also locked the door to the yard.