Can dry ice clean a data centre server rack without taking equipment offline?

The detailed answer

Data centre rack cleaning is a common dry ice application, but we only work on racks or rack sections that are isolated or powered down within your operator's change window — the same equipment/no-electrical-work-live rule applies to IT gear as to switchgear. Within that window, pellets remove dust, lint and particulate from cooling fins, fan filters, cable management trays and rack frames without introducing moisture or abrasive media into airflow paths, and there's no drying time before you re-power. Particularly valuable in colocation environments where change windows are short. Per-rack documentation provided. Often combined with air-quality measurement before/after for SLA reporting.