Cooling Tool
Estimate required precision cooling capacity, effective unit capacity, active units, standby units and airflow for technical-room planning.
Quick Answer
Enter heat load, SHR, derating, unit capacity, target utilization and redundancy mode. The calculator estimates required cooling and the number of active and standby units.
Sizing Inputs
Use this as a planning estimator for precision cooling. Final design must be checked against equipment datasheets, airflow paths, room layout, redundancy requirements and HVAC engineering review.
This calculator separates required cooling load, effective unit capacity and redundancy. Real CRAC/CRAH selection also depends on airflow, return-air temperature, water temperature, external condenser conditions and room layout.
Formula / Method
The calculator sums IT load, UPS or power losses and other room heat. It adjusts the load by the sensible heat ratio, adds a safety margin, applies unit derating and checks how many active and standby cooling units are required.
Required cooling = ((IT load + losses + other heat) ÷ SHR) × (1 + safety margin)
Inputs
Use IT load, power-loss percentage, other room heat, safety margin, sensible heat ratio, nominal unit capacity, derating, target utilization, redundancy mode and target air ΔT.
Uses
Useful for early CRAC/CRAH planning, technical-room cooling checks, unit count estimates, redundancy planning, capacity discussions and handover documentation.
FAQ
No. This is a planning estimate. Final selection must be checked against manufacturer datasheets, airflow configuration, water or refrigerant conditions, return-air temperature, redundancy requirements and site-specific engineering review.
Technical-room loads are mostly sensible heat, but unit performance can still depend on the sensible heat ratio. The calculator uses SHR to avoid treating all load assumptions as perfectly ideal.
N+1 means the active units should cover the calculated load, with one additional standby unit available for redundancy or maintenance scenarios.
Learn More
Project
ITCOREOPS can support cooling checks, rack power planning, structured cabling, technical-room documentation and operational handover.
Disclaimer
This calculator provides a simplified planning estimate only. It does not replace HVAC design, manufacturer documentation, qualified engineering review, airflow validation, redundancy design, site survey or professional commissioning approval.
Workflow
Use this calculator before selecting CRAC/CRAH units, planning N+1 or 2N topology, expanding IT load, or documenting cooling capacity assumptions.
Support
For cooling checks, rack power, structured cabling and operational infrastructure support, visit ITCOREOPS.
Feedback
Report display problems, calculation issues or suggestions for improving this calculator.
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