Field reference for data center critical facilities technicians. 5 entries, taken from the RackWatt app.
Reference notes from RackWatt, the offline field toolkit for data center critical facilities technicians. It works with no cell signal, because the sites do not have any.
Get RackWatt on the App Storelabel: Traditional enterprise. value: 3 to 8 kW per rack
label: Modern environments. value: 8 to 15 kW per rack
label: AI and high performance computing. value: above 20 kW per rack and climbing
Density is climbing quickly. Size cooling and distribution for the design target, not today only.
label: Modern high density target. value: about 20 to 30 F, 11 to 17 C
label: Below band. value: over cooling or airflow bypass
label: Above band. value: airflow shortfall or recirculation
An out of band delta T is a symptom. Confirm airflow and containment before adjusting setpoints.
label: High density racks. value: 1,500 to 2,500 cfm
label: Low density racks. value: 500 to 1,000 cfm
label: Rule of thumb. value: about 120 cfm per kW
Use the rule of thumb to sanity check a calculated airflow figure.
label: AI ready facilities. value: available fault current can exceed 100,000 A
label: Authority. value: the site arc flash study governs
This tool raises awareness only. Incident energy and boundaries come from the site arc flash study, never from an estimate.
label: Day tank. value: about 8 hours typical
label: Refuel. value: can be refueled while running
Fuel burn rises with load. Confirm the main tank and the refueling contract for extended outages.
Reference notes from RackWatt, the offline field toolkit for data center critical facilities technicians. It works with no cell signal, because the sites do not have any.
Get RackWatt on the App StoreThese notes are a field aid, not a substitute for the governing codes, the stamped drawings, the authority having jurisdiction, or manufacturer manuals. Verify against the current documentation for your installed equipment.