Microsoft DUB13 is the last of four single-storey data centres that Microsoft won permission for in June 2016: DUB09, DUB10, DUB12 and DUB13. It is the southernmost building of the western block on Microsoft's second Grange Castle campus in Clondalkin, west Dublin.
Construction of the block began in August 2016, and DUB13 followed its three siblings into service in 2021. As built, DUB13 is shorter than the other three, with a footprint of about 11,400 m².
Cooling
Rooftop air handling units cool the data halls with outside air. Evaporative cooling supports them on the hottest days.
Utility
ESB Networks serves the campus from the Kilmahud 110 kV customer substation on site. EirGrid operates the transmission system. No behind-the-meter generation serves DUB13.
Backup Power
Eight standby generators back up the data halls, with a separate admin generator. Microsoft converted the campus generators from diesel to hydrotreated vegetable oil (HVO) in 2023 and 2024.
Campus
Microsoft runs twelve data centres at Grange Castle, from DUB03 (2009) to DUB15, plus the stand-alone DUB11.